Customer reviews from sharkninja.com
Shark - Refurbished Excellent - PowerDetect Clean & Empty Cordless Stick Vacuum & Auto-Empty System with Powerful Suction, Up to 70 min Runtime - Dark Gray
Average customer rating
4
(514 Reviews)
Rating breakdown 514 reviews
5 Stars
308
4 Stars
56
3 Stars
46
2 Stars
40
1 Star
64
68%of customers recommend this product.
(
165 out of
241)
Customer Reviews for Shark - Refurbished Excellent - PowerDetect Clean & Empty Cordless Stick Vacuum & Auto-Empty System with Powerful Suction, Up to 70 min Runtime - Dark Gray
Customer Rating
5
Great upgrade!
on April 14, 2026
Posted by: Susan 71
from Missouri
Gender:Female
Lots of improvements since my last cordless shark! The floors seem cleaner, the hair doesn't wrap, I do love this vacuum!
I would recommend this to a friend!
Written by a customer while visiting sharkninja.com
Customer Rating
5
Christmas Gift
on April 7, 2026
Posted by: Tammy7402
Gender:Female
Bought this vacuum for my mom and dad and they love it.
I would recommend this to a friend!
Written by a customer while visiting sharkninja.com
Customer Rating
2
Keep your money … not worth it
on April 4, 2026
Posted by: Pearls reviews
Gender:Female
I have really tried to like this product.
Best features are charging station and self cleaning .
Boost power is very poorly designed and only gives a boost transitioning from hard floor to carpet.
Does not pick up well on hardwood floors.
I would return this if I could , but waited too late.
SO NOT WORTH THE MONEY.
Best features are charging station and self cleaning .
Boost power is very poorly designed and only gives a boost transitioning from hard floor to carpet.
Does not pick up well on hardwood floors.
I would return this if I could , but waited too late.
SO NOT WORTH THE MONEY.
No, I would not recommend this to a friend.
Response from sharkninja.comBy SharkNinja, April 7, 2026
Hi Pearl,
Thank you for taking the time to share your detailed feedback on the PowerDetect Cordless. We’re sorry to hear that your experience did not meet expectations, especially after giving the product a fair try.
We appreciate you highlighting the features you liked, such as the charging station and self‑cleaning function. At the same time, we understand your frustration with the boost power behavior and pickup performance on hardwood floors, as well as the disappointment of feeling you missed the return window. That’s certainly not the value or experience we want for our customers.
We’d like the opportunity to troubleshoot this with you and review whether there may be settings, usage tips, or support options that could help improve performance. Your feedback is important and helps guide future improvements.
Please reach out to our support team here so we can assist you further:
https://support.sharkninja.com/contact-us
Thank you again for sharing your honest experience.
Sincerely,
Shark Home
Thank you for taking the time to share your detailed feedback on the PowerDetect Cordless. We’re sorry to hear that your experience did not meet expectations, especially after giving the product a fair try.
We appreciate you highlighting the features you liked, such as the charging station and self‑cleaning function. At the same time, we understand your frustration with the boost power behavior and pickup performance on hardwood floors, as well as the disappointment of feeling you missed the return window. That’s certainly not the value or experience we want for our customers.
We’d like the opportunity to troubleshoot this with you and review whether there may be settings, usage tips, or support options that could help improve performance. Your feedback is important and helps guide future improvements.
Please reach out to our support team here so we can assist you further:
https://support.sharkninja.com/contact-us
Thank you again for sharing your honest experience.
Sincerely,
Shark Home
Written by a customer while visiting sharkninja.com
Customer Rating
5
Perfect vacuum
on April 2, 2026
Posted by: Aspiring cleanie
from Massachusetts
Gender:Female
Best vacuum I’ve ever owned and is nowhere near the cost of its D———— predecessors. Have been using it for a few months now and love the fact that I do not have to get up close and personal with the dirt and debris. It is so easy to maneuver in small spaces and under furniture. It is well made, stores neatly and is always ready to go. It cleans up the whole place and then cleans up itself!
I would recommend this to a friend!
Written by a customer while visiting sharkninja.com
Customer Rating
1
on March 31, 2026
Posted by: Tmade
I got a brand new vacuum for Christmas and it's never been used and it doesn't work
Response from sharkninja.comBy SharkNinja, April 1, 2026
Hi there,
Thanks for letting us know what happened. We’re really sorry to hear that your brand new Cordless PowerDetect isn’t working right out of the box. That’s not the experience we want for you, and we’d like to help get this resolved as quickly as possible.
When you have a moment, please reach out to us here so our team can take a closer look and assist you:
https://support.sharkninja.com/contact-us
Sincerely,
Shark Home
Thanks for letting us know what happened. We’re really sorry to hear that your brand new Cordless PowerDetect isn’t working right out of the box. That’s not the experience we want for you, and we’d like to help get this resolved as quickly as possible.
When you have a moment, please reach out to us here so our team can take a closer look and assist you:
https://support.sharkninja.com/contact-us
Sincerely,
Shark Home
Written by a customer while visiting sharkninja.com
Customer Rating
5
Exceeds expentatios!!!!
on March 30, 2026
Posted by: Phil F
from Californis
Gender:Male
The Auto Empty Debris Canister is a game changer for what I thought was a small debris canister. The debris auto detect sensor works great. The baseboard detector works great.
I would recommend this to a friend!
Written by a customer while visiting sharkninja.com
Customer Rating
2
Disappointed
on March 30, 2026
Posted by: Katie0209
Gender:Female
I own Model: BU3521, and thought I would upgrade to this model to keep in a different area of my home. I love the convenience of no cord and vacuuming every day, so I figured since this had more features and it was more expensive it would be an upgrade. What a disappointment, I wish I had bought another BU3521. It's hard to turn on, it doesn't detect the flooring easily - doesn't pick up when vacuuming in reverse like the description says. When I used the power boost, the charge didn't even last 20 minutes. I didn't save the box, so I don't know how I can return and replace with the other model...Shark, can you assist?
Response from sharkninja.comBy SharkNinja, April 1, 2026
Hi Katie,
Thanks for taking the time to share your experience with us. We’re really sorry to hear that your Cordless PowerDetect hasn’t lived up to your expectations, especially since you’ve enjoyed your BU3521 so much. Turning the vacuum on should feel easy, floor detection should be consistent, and the vacuum should pick up effectively in both directions. We understand how frustrating it is when these features don’t work the way they should. We also know how disappointing it feels when the runtime drops too quickly while using power boost.
Even without the original box, we’d be happy to take a closer look at your unit and explore options to make this right for you.
When you have a moment, please reach out to us here so our team can assist you:
https://support.sharkninja.com/contact-us
Sincerely,
Shark Home
Thanks for taking the time to share your experience with us. We’re really sorry to hear that your Cordless PowerDetect hasn’t lived up to your expectations, especially since you’ve enjoyed your BU3521 so much. Turning the vacuum on should feel easy, floor detection should be consistent, and the vacuum should pick up effectively in both directions. We understand how frustrating it is when these features don’t work the way they should. We also know how disappointing it feels when the runtime drops too quickly while using power boost.
Even without the original box, we’d be happy to take a closer look at your unit and explore options to make this right for you.
When you have a moment, please reach out to us here so our team can assist you:
https://support.sharkninja.com/contact-us
Sincerely,
Shark Home
Written by a customer while visiting sharkninja.com
Customer Rating
2
I ave never been more disappointed in a purchase!
on March 29, 2026
Posted by: KrLi
Gender:Female
This vacuum would be great if we didn't have pets! (We have 2 dogs and 2 cats) I have to stop every couple of minutes and unclog hair and debri that builds up on the roller brush. The only way it really sucks anything up is if it is in turbo mode. However, then the battery dies before I get half way through with the house ( our house is only 1300 sqft) I really wish I would have stuck with a classic upright vacuum 😢
No, I would not recommend this to a friend.
Response from sharkninja.comBy SharkNinja, April 7, 2026
Hi there,
Thank you for taking the time to leave a review.
We’re really sorry to hear how frustrating this experience has been, especially in a home with multiple pets. We completely understand how disappointing it can be to constantly stop to remove hair from the roller brush, rely on Turbo mode for effective pickup, and then have the battery run out before you’re able to finish cleaning your home. That’s certainly not the convenience you were hoping for.
Your feedback about pet hair buildup, suction needs, and battery life is important to us and will be shared with our product team. We recommend reviewing the troubleshooting guide for your Shark POWERDETECT Cordless Vacuum, which includes steps that may help improve brushroll performance and efficiency when cleaning pet hair:
https://support.sharkninja.com/article/IP3225-Series-Shark-POWERDETECT-Cordless-Vacuum---Troubleshooting-Guide
If those steps don’t resolve the issue, the guide will direct you to our Customer Support team so they can assist further and review available options with you.
Kind regards,
Shark Home
Thank you for taking the time to leave a review.
We’re really sorry to hear how frustrating this experience has been, especially in a home with multiple pets. We completely understand how disappointing it can be to constantly stop to remove hair from the roller brush, rely on Turbo mode for effective pickup, and then have the battery run out before you’re able to finish cleaning your home. That’s certainly not the convenience you were hoping for.
Your feedback about pet hair buildup, suction needs, and battery life is important to us and will be shared with our product team. We recommend reviewing the troubleshooting guide for your Shark POWERDETECT Cordless Vacuum, which includes steps that may help improve brushroll performance and efficiency when cleaning pet hair:
https://support.sharkninja.com/article/IP3225-Series-Shark-POWERDETECT-Cordless-Vacuum---Troubleshooting-Guide
If those steps don’t resolve the issue, the guide will direct you to our Customer Support team so they can assist further and review available options with you.
Kind regards,
Shark Home
Written by a customer while visiting sharkninja.com