Hello There, basically the clock is ok, unfortunately the software does not deliver what it promises. I have the problem that the clock is not synchronized with the Android app does not also with different phones. Even after contact with the support there was no solution. Unfortunately, needs the support very long until you get an answer. Amazon sent me a new clock to be ruled out that it is up to the clock, the support of Amazon's super. When web portal it is very unfortunate that the pace zones you can not make free with such a clock, Polar has here minimum distances predefined by 2 min / km, need to be followed, otherwise it leaves the entrance not save the data to. The GPS reception is great and therefore the displayed tracks, the Back to Start function works perfectly. I hope that at the Polar software or nachbessert and customer inquiries also takes seriously and cares times drum, then maybe more stars.
