For product:
The measurement of the HF is precisely (repeatedly tested under different loads). The setting of the RF training zone and measuring the time below, within and above this I find very convenient.
The menu system is a bit strange, but by no means cumbersome.
The reported partly interruptions of the measurements I can not confirm. After 5-10 seconds after the belt the HF is measured when the clock is nearby and the menu button is pressed. A moistening the sensors is not necessary, I do it anyway but since I have the impression that the measurement can start faster.
The easily adjustable chest strap fits well, does not slip and is only aware noticeably after a certain period of familiarization.
The heart rate monitor itself is a bit clunky and the bracelet is my feeling after too stiff, which makes them not present at the entire wrist and is somewhat difficult to don and doff. Otherwise, the clock does not slip and can also impossible while running by himself open.
By lighting function the digits can be seen very well in the dark.
All in all I have for this price also get what I expected, a well-functioning heart rate monitor with all the basics.
