This headset is really unconventional. Beautiful, technology, easy to implement and still sound great, configurable at the owner's tastes through the iphone app suitable. But unfortunately the superb design interferes with some usability. He does not hold well on the head and I'm not talking about sport, but just walk a little faster in the street. If you are bald like me, go your way! the arch is unpleasant and helmet slides back. With hair that may be better, but it is frankly not great: /
