Couldnt fault this. There isn't a lot of activity/sports trackers with all the features this Alta HR has at this price. The quality is great, and I havent really had any problems with it.
It took me a while to get used to tapping the screen to navigate as opppsed to a more conventional "swiping" gesture, but thats a super minor detail, and once you are used to it, you barely see it as an issue.
Great value, solid, and surprisingly can take a bit of abuse (just dont shower/bathe/ swim eith it, as it isnt waterproof)