I've bought the VS as a "movement motivator", and successfully in use here. He wakes me up on time, working with my ANT + chest strap together, and has a surprisingly high Bluetooth range: a Sony Xperia Tablet He connects over 2 floors. But even with my BlackBerry Q10 it operates stably together via BT. (Connect app via sideloading installed). I have indeed only a limited functionality, because logically any missing Google Play services, but to me important things work. Small flaw: personal heart rate zones are not taken, here one must probably to the next firmware update hope (currently 3.10)