About the size, it is actually bigger than average but it is really very light and is forgotten very quickly (especially with three sizes of tips that can adapt perfectly to his ear).
It works on both right and left and of course the detection of the phone is very fast. I also use with glasses without any worries.
Some speak of fragility. I do not think so. Yes the materials used are not the strongest but we must make choices that the latter is light! I personally did not want to linger with a titanium headset to make sure it is foolproof! For me the materials are lightweight but strong enough to air. This is not a plastic first choice either. And it's still a bluetooth headset, you are not supposed to play rugby! ;-)
