Well first the positive aspects:
If you heed the little tip connects the headphones easily with all kinds of Bluetooth devices. (Tested with Mac, iOS, Android) disconnections, or poor connection quality music, videos, or even play has not occurred to me, everything easily Imer.
The battery lasts loose for several days at 2-3 hours of use a day. Here I find particularly good: If the battery but should then be times empty, so you can still connect the supplied Aux cable, the headphones will still work even without battery!
The operation of the buttons is on the right ear and works great.
The speakerphone was working fine also in bus and train!
Now for the caveats minimum, or more neutral points:
The ambient noise is not so strongly shielded, as I had hoped I might.
CONCLUSION:
Buy Absolutely! Can not go wrong with. Price performance ratio is great and ideal for everyday use in any case!