This was the first bluetooth I purchased and I was very unhappy with the following:1. The biggest problem is that it doesn't stay on your ear.If you move your head at all the unit comes off.2. The next and almost biggest problem is you can't hear anything (volume way to low - even with no outside noise)I just received the Plantronics Explorer 320 and so far its 100% better and that's based on the fact it fits in your ear very well and the volume is also 100% better than the Motorola 820