Nice gadget but unfortunately, the battery of the sensor can not be replaced!

The clock has, I believe, good workmanship and material quality and relatively elegantly conceived one-button operation. Also, I have the pulse value most quickly and reasonably resistant available (but I have the impression that when walking through the city center often something hooked with the transfer. Interference?). The comfort of the clock and especially of the chest strap I find very high.

However, there is a small flaw: the "Heart Touch" function. The idea seems only times well: while running the display alternates between pulse value / stopwatch / time you can by bringing the clock to the sensor on the chest strap without changing the button to actuate. Each change is acknowledged by a beep (not switched off). Unfortunately, it comes at me from time to time that, unintentionally, the function triggered when running. Actually I want to anyway always see while running only the pulse value, but if I want to watch, it's just more so that the display has shifted. In the FT1 can be (unlike the more expensive models) the HeartTouch function does not turn off. This is a bit unfortunate.

Addendum: massive Runterstufung: you can not change the battery of the sensor, but must buy a new one !! So my interaction is now finished with this heart rate monitor after more than 1.5 years already.