Customer reviews from Garmin
Garmin - Index Sleep Monitor Size: S/M - Black - (2025)
Average customer rating
3.3
(202 Reviews)
Rating breakdown 202 reviews
5 Stars
59
4 Stars
43
3 Stars
36
2 Stars
26
1 Star
38
Customer Reviews for Garmin - Index Sleep Monitor Size: S/M - Black - (2025)
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
Customer Rating
1
Features are great, software quality s tragic
on March 26, 2026
Posted by: kerembe
Garmin Sleep Monitor a nice monitoring tool, but I had to un-pair and pair it again for the 4 the time !!! As your updates always break it up. Watch is stable, so why not the monitor ? ! ?
IT HAS HORRIBLE STABILITY OF CONNECTION, I suppose that your horrible low quality of software code is caused by AI coding.
IT HAS HORRIBLE STABILITY OF CONNECTION, I suppose that your horrible low quality of software code is caused by AI coding.
Written by a customer while visiting Garmin
Customer Rating
3
Okish
on March 26, 2026
Posted by: KimW1
It is a niceity to have. However, I have had several times where the device shows on my body battery stress levels but fails to give a sleep score in the morning which is somewhat important.
Written by a customer while visiting Garmin
Customer Rating
2
Long time Garmin fanatic
on March 24, 2026
Posted by: Garmin freak
I’ve been in the Garmin echo system for a long time and I have been wanting them to make this for a while. To say I’m disappointed in this product would be an understatement. I’ve had it sense it was released and had nothing but issues with it. Where can I start. First of all about once every couple weeks it will not read anything. It takes forever to sync. And about once a month it looses connection completely and will not reconnect so bad in fact that I have to delete it out of my system and re-add it back in witch is how I got to do this review after having it so long. I don’t know if there’s an update or something I’m missing but I’m really unsatisfied with it. I’m really hoping there’s an update or something. I really love all my other Garmin products!
Written by a customer while visiting Garmin
Customer Rating
2
Meh
on March 23, 2026
Posted by: Sleep Index
This is the third time I have had to 'forget' my device to try to get it to sync. When it works, it's great. When it doesn't it is super frustrating. Won't sync or gives me crazy off data... that doesn't make sense. I can understand if it is loose on my arm and the numbers get off numbers - but that's not the case. Ultimately, if you don't mind being frustrated once a week b/c it suddenly won't sync then it will work for you. I really really want it to work - it's comfortable and I'm "all in" on other garmin products. Maybe I have a bum device - I've had issues multiple times and only started using 4 months ago.
Written by a customer while visiting Garmin
Customer Rating
5
So comfortable
on March 22, 2026
Posted by: Shan0103
I bought this about a month ago because I dont love sleeping in my watch. This is very comfortable and provides so much more information.
Written by a customer while visiting Garmin
Customer Rating
5
Comfort
on March 17, 2026
Posted by: Jas824
I bought this because I dont like the. feeling of sleeping with a watch. also do not want a rash on my wrist and so far just getting used to the comfort of it. I like it, metrics are great, not sure how accurate they are compared to a watch
Written by a customer while visiting Garmin