Good headset, but very ergonomic

Perfect compatibility with my Xperia M: all keys work as expected, even the "magic" (which IMHO is useless).
I wanted a helmet that allows me to use the mobile phone as an MP3 player (set volume to pause / play, skip to the next song or return to the previous one) but also answer calls: I have what I wanted. The sound is not great but it is correct, and communication means well, and is understood by his interlocutor.

However, if I compare with my previous headset that cost me 10 (not compatible with versions of Android too recent unfortunately, otherwise I would have kept!), Ergonomics is rather disappointing.

The keypad is placed too close to the earpiece, which requires almost touching his ear to anything, and the key layout makes it difficult to support properly the button that makes change track. It is believed advance of a song and no, we did break, it is believed to go back to the previous one and no, we advance. Quite unpleasant.
As for dishes son, supposedly for not doing nodes is the scam of the century they tangle anyway and they just take twice as space in the purse.

I put 4 stars because even when compatibility is good and sound, too, and that the headset comes with six pairs of replacement earbuds in three different sizes, to adapt well to the ears.