Now after many headset by Nokia and Sony I use the Logitech. I fought long against the purchase because it me always very large and uncomfortable occurred in the packaging and in photos. Big Mistake! The comfort is excellent, finally a headset, threatens that not go in jerky movements or the bike to slide from the ear. The ear clamp is much more comfortable to wear than the bracket of most other sets. Moreover, this allows one ear change without an adjustment of carrying straps. Simply pull the ear, and to the other clips. Works within seconds, and especially with one hand!
The speaker is padded with foam, and foam muffler (under windy conditions ..) for the microphone are included. The product material is pleasantly silky, no comparison to the hard plastic of the competition.
At the sound quality I've not subjected to when using with Skype, even with mobile phones a bit. In fact the battery lasts 8-10 hours.
In short, after a familiarization phase, I can imagine no other headset more!