Excellent Bluetooth stereo headset for mobile phone

That's exactly the product I was looking for: a very good listening to music from my mobile without ever missing a call. As for comfort, the promises of the description are required. After trying all silicone tips (there are 4 different sizes), I found the pair that suits me best from the perspective of comfort while optimizing the listening quality.
Perfect helmet to not miss a call (you were listening to music or not), a beep alerts you and just press a key that can easily be found on the left atrium thanks to relief logo. Time soon the conversation, if you listen to music, it automatically resumes.
Ideal in shops or on the street (the noise made me miss most of my calls) and even at home.
Plus, it's not to be bothered with the son who enmèlait incessantly.
Price aside, it's still honest. There are wired headsets that cost double. Although they may still sound better, I prefer it already has very good sound characteristics AND WIRELESS.
A storage bag would have been welcome. Too bad she has been provided with. But hey, we can not ask for the moon at this price.

04/03/2012:
Always very satisfied after an almost daily use since the purchase (05/02/2012). I can not do without me. BUT:
If you are convinced and buy, be careful: the silicone tips can be removed easily; suddenly, they may fall. The risk of not realizing and perdre.J'en have personally lost.
Since then, as soon as it is no longer on my head, I put immediately in a bag (I have done on a thick velvet measure that is perfect).
Besides, sometimes a ferrules detaches and remains in the bag when I go on the headset.

Furthermore, I still have not figured out how (or rather when) buy a spare set.
I just report the issue on the Motorola site, asked them where to find tips, especially as the headset itself is not present on their site.
I expect an answer. As soon as I have it, I'll let you know.
Note that these tips are specific in form and special characteristics (reduction of ambient noise). So standard tips that are found in certain shops (on the Amazon site, among others), apparently not suitable.

If someone has the solution, thank you to enlighten us.