Unreliable system

I have received and am eager to test me: the headphones are bulky and not very discreet in the ears.
I use it in running, in pairing with my watch adidas smart run: no cut when I run since my arms are at my waist. By cons, if the arms are lower, there are the small cuts.
Regarding autonomy, for the moment no problem, the charging system is quite simple. See with time.

Update June 2014: After three weeks of use and charging cycle headphones, the headphones are not detected by any of my Bluetooth devices. The system is unusable after less than a month of use. I have therefore returned. Positive: neither the seller nor Amazon have made for the return of history and reimbursement. The seller is responsible for return shipping cost and I was paid ten days later (a star for the product but good service anyway).