I like the watch overall. Very great watch for running and monitoring health. Unfortunate there is no Spotify compatibility like in other Garmin watches but a great running watch which is what you’re really paying for. Not sure if this was the same for other people but every time I have worn the watch my wrist gets pretty irritated. I have disinfected it a few times in case it was anything my watches had picked up. It hasn’t worked and it is very inconvenient to need to buy a new watch strap for a new watch. I’ve been a long distance track runner for over 10 years and have never had this issue with any watch I have had before (mainly Ironman watches).Again, great watch for what it is designed to do. But the watch strap could be improved or come with different styles.

I've had the Garmin Forerunner 935 for a few weeks now, and although I like the long list of features, and the integration with the Garmin Connect website and the Android smartphone app, it cannot be trusted to accurately record your heart rate, which is a damn shame, as that's its primary purpose. If you connect it with a compatible chest strap heart rate monitor, the heart rate data is of course very accurate, but the wrist-based measurements can be waaaay off sometimes. For steady state activity, like sitting around, or jogging, it's accurate, but if the activity is one where your heart rate is going up and down, like a strength training workout, or doing intervals, it will report crazy wild data that is totally unaccurate. For example, today at the gym, I did my strength training routine. One exercise typically has my heart near its maximum heart rate - about 170 beats per minute, as measured with a Polar H7 chest-strap heart rate sensor. The 935 however showed my heart rate as 65-70. I even stopped the exercise and gave it time to recover, and it didn't. It stayed at around 70. Only after I had finished my 4 sets, and was resting did it start to show an elevated heart rate. For the record, I'm caucasian (skin color can affect optical heart rate monitor readings), and my forearm where the watch contacts the skin is shaved. With subsequent sets, I even tried adjusting the tightness of the strap, both looser and tighter. It didn't fix it. Anyway, there are a lot of exercises I do like this, where the heart rate is going up and down. I jog/walk sometimes, for example. I can't trust this watch without the strap monitor to track my heart rate accurately. It makes me not trust the heart rate monitor functions of the watch at ALL, actually, as it appears that much of the heart rate info is gleaned through one of those lovely, alchemic algorithms. I'm now forced to use a chest strap when gathering excercise data is important. Also, it very often does not record my sleeping at night. It tells me I didn't wear the watch when I was. And the stress function performance is spotty. It's fun to look at the data and use it to adjust your daily activity, but I just wish the wrist-based function actually worked as advertised. Otherwise, all of the cool features (sleep, stress, exercise, etc) that depend on the wrist-based heart rate measurement cannot be trusted. It's quite disappointing as the reason I spent $475 on the watch was to end my dependence on the chest strap monitor.

I had a Fenix 3 for six years and I loved it, it worked perfectly until the battery died. I bought this watch (935) to replace it and broadly speaking I can say it has pretty much the same features. However the GPS sensor is a huge disappointment, in every run activity there are tremendous inconsistencies on distance and paces.I wouldn't recommend this watch for athletes who need to train with accuracy on their paces and distances. And it's even worst in short intervals.