Discreet, elegant, autonomous, with excellent sound reproduction, perfectible ergonomics.

Tested on many different sources, and music of all genres: excellent sound reproduction, good dynamics, very wide bandwidth ... The sound is not compressed, for example, the Plantronics Backbeat Pro. Whether classical, pop, electronic music, voices, sound definition is at the rendezvous. This helmet does not transform a complex message into audio puree. Extreme low to the highest treble, everything is transcribed in very good conditions.
His only limit it does not help a bad product or bad piece recorded will be heard as such. So if you go to m .... you will hear the m ... with all the details.
The sound insulation of small headphones is very good, mainly on the side of lower midrange. The sensation is not that of a cut from the outside world, but a sharp attenuation.
The small size of the helmet, light weight, and relatively high pressure (I speak of a new helmet, which has not yet "made it") make it holds well, but without generating real discomfort. The foam quality earphones is certain. A "large" head like mine just happens with a lot of hair, it would be more difficult.
The only notable flaws: the controls, their touch and their operation. Everything is grouped on the right earphone. The headset's surface serves as on / off button. And as the indicator LED is placed in the middle, you put your finger on it to turn on and off, not very practical. The multifunction button, which is used to change the volume and switch from one to the other track is "shaky" and without tactile sensation. Up / down for volume, support or two tracks, is pressed judgmental, often slightly askew, and we see the result. Bad.
The three most important criteria for a bluetooth headset being assembled: autonomy (apparently over 10 hours), sound quality (excellent, I repeat) and comfort (lightness, quality foams), I can only strongly recommend this model.
I have not tested the contactless pairing without useful gadget. The quality of telephone conversation is drinkable, with metal but understandable voice. The scope of the bluetooth is not very good, barely ten meters (tested with a galaxy Note 2).
In short, an excellent workmanship headset, user-oriented. The most ostentatious helmet does not offer all the same listening quality. One star less for ergonomics that leaves something to be desired. But that's a detail.

Pairing is fast,