I've had this watch for about a month. The user interface on the watch itself is a bit clunky, but this is a cheap watch so that's exactly what I'd expect. The layout is a bit odd and makes it hard to intuitively figure out how to change clock faces without consulting the manual which comes with the watch. Many settings (such as when the heart rate sensor should be running) are available only through the app, not on the watch itself. It has great battery life, lasting around a week on a charge and far surpassing anything else I've seen or used.My watch worked well for awhile, but about a week or two ago it started to get a bit buggy. It seems to keep resetting itself for some unknown reason. Obviously, resetting the watch doesn't seem to fix this as it seems to be an issue of the watch already randomly itself. The most annoying part of this for me is that I like to keep the heart rate sensor going 24/7, and when it resets it goes back to the default setting off running only from 6 AM through 10 PM. It will also reset the clockface, which can also be a tad annoying. This resetting only started awhile after I got the watch, but it happens about once a day or so. Your mileage may vary. At the end of the day, it was a cheap watch (I got it sale for less than $30) and I suppose this comes with the territory.