Reviewed by Dave - 23rd Feb, 2018Great training tool, but not perfect!On the whole, a great running watch (supports running and cycling, so another model might be a better choice if you want to track other sports), but with a couple of reservations. i) The heart rate monitor wasn't reliable during runs for me. I appreciate that it works well for some, but for me would often lock on to my cadence, not HR. I now use it with a chest strap which is great. The optical HR might be fine for you, and still useful for daily activity tracking. ii) The 'lap' button stuck after a month. Exchanged without quibble, but makes build quality questionable to me.