Summary: The sound is terrible, the portion that inserts into your ear is extremely large and did not fit into my ear. When you try to put the little device in your ear you end up inadvertently making phone calls because of the position of the buttons. I've had several bluetooth devices and this is by far the worst. I recommend getting the plantronics discovery 650.
Summary: Sound and mike not bad but breaks up if on the wrong side to the phone even if only a few feet away. The worst feature is that the record for keeping it in my ear without it falling out is 3 minutes no matter what fitting you use with it. Maybe I have strange sized ears but it stays if longer if you dont move, talk or swallow.
Summary: Just bought one today total joke,cannot here anyone while talking in a diesel pickup.the reception keeps on breaking up,and the person you are talking to you seems miles away,the volume cannot be turned up enough ,so you cannot hear the other person talking.Very good looking earpiece nice and small just a shame it does not do what it says on the tin.Would work very well in a libary but thats about it.