I use the clock for spinning. For my very narrow wrists the clock for everyday life is something big and unfortunately a bit uncomfortable to wear, for sport but they do not bother! De functionality is as described and absolutely enough for me. I never had problems with other favorites that between sparks, or general order to find problems my controller. Works flawlessly, display of the heart (in the desired frequency range or outside) would be somewhat larger in my opinion.
This one-button operation is already special. I do not understand why Polar not incorporating a button more. But despite everything, it is logical, but unfortunately sometimes only takes a little longer or needs several attempts to achieve a desired menu to look at or migrate. I'm now well so clear, as there is determined but enough people who have difficulty.
What I find really unpleasant is switching during training between 3 displays. Therefore you have the clock a few seconds to bring up close to the belt. Annoying when one is driving while standing and only time will shortly have the time. Since there are three ads, you have to get to the original display, then bring twice the clock on the belt. Result: I do not watch the time :(
But these are all points of criticism at a high level, by measurement, of the settings, etc., the clock super!