Customer reviews from Garmin
Garmin - Index Sleep Monitor Size: S/M - Black - (2025)
Average customer rating
3.3
(192 Reviews)
Rating breakdown 192 reviews
5 Stars
55
4 Stars
43
3 Stars
34
2 Stars
22
1 Star
38
Customer Reviews for Garmin - Index Sleep Monitor Size: S/M - Black - (2025)
Customer Rating
2
Not worth the money
on April 16, 2026
Posted by: DC Runner
Long time Garmin user, 15+ years. I had high hopes for this device, took a chance due to mixed reviews and think it’s a dud. Tracking is less reliable than my Fenix 8 pro or Epix gen 2. Both of those watches are large so I was looking for something easier to sleep with that produced more reliable sleep tracking. 50% of the time it stops tracking after about 3-4 hours. Device is fully charged and fit correctly on my arm. I paid full price only to see it popping up on sale everywhere right after. Disappointed, save your $ and consider an alternative.
Written by a customer while visiting Garmin
Customer Rating
4
Good data, a bit inconsistent to upload.
on April 15, 2026
Posted by: Ssort
Produces great information on sleep history/data but is a bit inconsistent on uploads and accuracy. But it’s better then nothing and much better than wearing a watch to sleep.
Written by a customer while visiting Garmin
Customer Rating
2
Crappy connection consistency
on April 15, 2026
Posted by: Aberntson
Super finicky about connecting and it's gotten worse over time. I've had to delete the connection to my phone almost regularly in the past month or so.
Connecting should be automatic and it doesn't do that consistently. Almost not worth it as I have a Fenix 8 as well. I'm wondering why I spent the money on it
Connecting should be automatic and it doesn't do that consistently. Almost not worth it as I have a Fenix 8 as well. I'm wondering why I spent the money on it
Written by a customer while visiting Garmin
Customer Rating
5
Great product
on April 11, 2026
Posted by: chris1982
I got this because I’m not a fan of sleeping with my watch on, it can be uncomfortable and wake me up if I try to sleep in with my notifications. Having this on while I’m sleeping also tracks if my body temp goes up. In the morning when I wake up I sync it to my app and put my watch on.
Written by a customer while visiting Garmin
Customer Rating
4
Very cool and comfy
on March 31, 2026
Posted by: Luis Sr.
Bought it two weeks ago so far it works fine and is comfortable, the only thing is that the smart wake window is not working but not a dealbreaker
Written by a customer while visiting Garmin
Customer Rating
4
Good for what it is....
on March 30, 2026
Posted by: A_Nickname
I love the concept of this device, but just falls short for me. I swear by wearing my watch 24x7 as it helped me detect my sleep apnea. But, wearing it all the time seems to "burn" my wrist where the sensor sets. So I bought this to wear at night to continue tracking metrics and give my wrists a break. The band is soft and once on, you don't notice it. Very easy to sleep with it on. The one down side that I have run in to is the alarm function. Even on the highest vibrating setting, I never feel it and have to default back to a regular alarm clock to wake up.
But overall, I like it and am going to keep it.
Written by a customer while visiting Garmin
Customer Rating
1
Poor performance and design
on March 27, 2026
Posted by: Sleepless in Hawai’i
It does not let you know when it’s low on battery. No indicator on the unit. Does not always record my sleep.
Written by a customer while visiting Garmin
Customer Rating
1
I'm disappointed.
on March 27, 2026
Posted by: Eilede
It does not work correctly with Garmin fenix 7s. The sleep data recorded by Garmin Sleep Index is replaced by Garmin fenix 7s data. And if you don't sleep in Garmin fenix 7s, you lose all the recovery analytics from Garmin fenix 7s. A smart alarm clock does not work like a smart one, but simply wakes you up at the appointed time.
Written by a customer while visiting Garmin