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
BEST VACUUM EVER! A GAME CHANGER!
on November 26, 2025
Posted by: DOLLY P
from Sonoma County, California
Gender:Female
I LOVE MINE! Have multiple dogs, shepherd and husky too, and cats. Lotsa hair!
This is a game changer. Fits in between bar stools and under beds perfectly. Don't know what I did without it
BRILLIANT too that each piece is sold individually..amd cheaply..if you break it. I abuse mine and it keeps going.
I HIGHLY RECOMMEND THIS PRODUCT. MAKE YOUR CLEANING EASIER AND FUN
This is a game changer. Fits in between bar stools and under beds perfectly. Don't know what I did without it
BRILLIANT too that each piece is sold individually..amd cheaply..if you break it. I abuse mine and it keeps going.
I HIGHLY RECOMMEND THIS PRODUCT. MAKE YOUR CLEANING EASIER AND FUN
I would recommend this to a friend!
Written by a customer while visiting sharkninja.com
Customer Rating
2
Battery only 20 minute runtime
on November 25, 2025
Posted by: CatA
Gender:Female
Lucky if it runs 20 minutes. I’ve been on the waiting list all year for another battery. I’m really disappointed in the runtime. I can only do a couple of rooms of hard floors, carpet runs the battery down even faster so I have to pick and choose what to vacuum. I wish shark would make this tight for me
No, I would not recommend this to a friend.
Response from sharkninja.comBy SharkNinja, December 1, 2025
Hi CatA,
Thank you for taking the time to leave a review.
We’re truly sorry to hear that your unit has a short runtime and you're unable to get a new battery due to stock. We totally understand how frustrating this must be. We kindly invite you to reach out to us at 1-855-427-5127, for further assistance. Our hours of operation are Monday to Friday from 9:00 a.m. to 9:00 p.m. ET and Saturday from 9:00 a.m. to 6:00 p.m. ET.
Kind regards,
Shark Clean
Thank you for taking the time to leave a review.
We’re truly sorry to hear that your unit has a short runtime and you're unable to get a new battery due to stock. We totally understand how frustrating this must be. We kindly invite you to reach out to us at 1-855-427-5127, for further assistance. Our hours of operation are Monday to Friday from 9:00 a.m. to 9:00 p.m. ET and Saturday from 9:00 a.m. to 6:00 p.m. ET.
Kind regards,
Shark Clean
Written by a customer while visiting sharkninja.com
Customer Rating
5
79 years old - best vac ever so far.
on November 24, 2025
Posted by: Dave in Sebring
Had for a couple of weeks. Great vacuum. We love the soft roller with the brush behind it. Our old cordless vac was fine, but only had spinning brush. To test how effective it was for dust, I sprinkled a bit of baby powder onto the vinyl plank flooring. Bet my wife it wouldn't pick it all up. I won. Had to go over it three or four times. You can prove the same thing yourself with a broom versus a dust cloth. Same principle. I'll order a second roller to put in while the first one dries when I decide it needs to be washed. Also love the self emptying feature. Saves a lot of time.
Written by a customer while visiting sharkninja.com
Customer Rating
2
It broke
on November 23, 2025
Posted by: Rick495
from Michigan
Gender:Male
I bought my shark BU 3521 about 2 1/2 - 3 months ago and it was the best! I loved it, I never had a stick vacuum before. The handle with the battery broke off so it’s unusable now and I don’t have the box or receipt so I can’t get a refund. I think the handle with the battery attached to it without any reinforcement is too much strain.
No, I would not recommend this to a friend.
Response from sharkninja.comBy SharkNinja, November 26, 2025
Hello,
Thank you for taking the time to leave a review.
We greatly appreciate your love towards our product. We’re disappointed to learn about the handle and battery issue, as that’s not the durability we aim to provide. Even without the box or receipt, we’d still like to help. We kindly invite you to reach out to our team via phone at 1-855-427-5127 for further assistance. Our hours of operation are Monday to Friday, 9:00 a.m. to 9:00 p.m. ET, and Saturday from 9:00 a.m. to 6:00 p.m. ET.
Kind Regards,
Shark Clean
Thank you for taking the time to leave a review.
We greatly appreciate your love towards our product. We’re disappointed to learn about the handle and battery issue, as that’s not the durability we aim to provide. Even without the box or receipt, we’d still like to help. We kindly invite you to reach out to our team via phone at 1-855-427-5127 for further assistance. Our hours of operation are Monday to Friday, 9:00 a.m. to 9:00 p.m. ET, and Saturday from 9:00 a.m. to 6:00 p.m. ET.
Kind Regards,
Shark Clean
Written by a customer while visiting sharkninja.com
Customer Rating
4
Great except for carpet
on November 22, 2025
Posted by: Cat Lady of 4
from Wisconsin
Gender:Female
I use the vac every day with pets in the house. Im very happy with the power, I just dont love that it is too powerful even in eco mode on rugs and carpets.
I would recommend this to a friend!
Written by a customer while visiting sharkninja.com
Customer Rating
5
Amazing!!!!
on November 20, 2025
Posted by: Mandijo
from Utah
Gender:Female
My entire family loves this vacuum so much! Even my kids want to help vacuum. It works on the carpet, The rug, the hard floors. It is so nice to finally have a cordless vacuum. My only complaint is that I didn't get this sooner!!!
I would recommend this to a friend!
Written by a customer while visiting sharkninja.com
Customer Rating
5
Powerful vacuum!
on November 17, 2025
Posted by: Shirleyofaspen
from Aspen Co
Gender:Female
I am so happy I bought the shark It really picks up everything And it's so easy to use. Makes me wanna vacuum more often.
I would recommend this to a friend!
Written by a customer while visiting sharkninja.com
Customer Rating
2
Low battery life between Vacumming.
on November 16, 2025
Posted by: Robfl
Gender:Male
The battery does not last long on this product. You probably get 20 mins of vacuum time between charges. Which is not a lot. Especially since it doesn’t charge back up until the battery is completely dead I noticed.
No, I would not recommend this to a friend.
Response from sharkninja.comBy SharkNinja, November 17, 2025
Hello,
Thank you for taking the time to leave a review.
We hear your concern, and we want to make this right. Runtimes are based on a new, fully charged battery. Like all lithium-ion products, the battery will naturally decrease in capacity over time. In ECO mode, the battery can achieve up to 70 minutes of runtime. Based on the runtime you’ve described, it sounds like there’s a chance the vacuum may not be working as it should. Could you please give our team a call at 1-855-427-5127? We’d love to help ensure you’re getting the most from your product.
Our team is available:
📞 Monday–Friday: 9 a.m. – 9 p.m. ET
📞 Saturday: 9 a.m. – 6 p.m. ET
Kind regards,
Shark Clean
Thank you for taking the time to leave a review.
We hear your concern, and we want to make this right. Runtimes are based on a new, fully charged battery. Like all lithium-ion products, the battery will naturally decrease in capacity over time. In ECO mode, the battery can achieve up to 70 minutes of runtime. Based on the runtime you’ve described, it sounds like there’s a chance the vacuum may not be working as it should. Could you please give our team a call at 1-855-427-5127? We’d love to help ensure you’re getting the most from your product.
Our team is available:
📞 Monday–Friday: 9 a.m. – 9 p.m. ET
📞 Saturday: 9 a.m. – 6 p.m. ET
Kind regards,
Shark Clean
Written by a customer while visiting sharkninja.com