Perfect, I have since July 2014

The cardio is great, it works beautifully with all phones that I had (Iphone 5, 5C and 6) but with the standard Polar watches and gym treadmills ,.
I never had any problems with connections, you just put the cardio self moistening the electrodes to turn on (and yes if it is not off) is not forget to activate the bluetooth of such so all your application asked, and that is part HOP.
Small precision the first connections (Pairing) to the phone is in the application and not in the Bluetooth devices, once made need to.
I put a comment now because I took a second for my wife and it drunk to see that people who do not know how to use can put comment.