This device is very compact and incredibly lightweight. It feels so much like a toy at first I thought I had purchased a display model by accident. Its' small size and presumably few internal components is also detrimental to its' performance. I used it for a week. Every caller said I sounded as though I was talking as normal. They would hear an echo of their own voice however, delayed a fraction of a second, which they found very annoying. A short term fix is to lower your earpeice volume, and you can see the downsides of that. Well, when my girlfriend is not happy then I'm not happy, back it goes. Sorry, Motorola, nice try though. If irritated callers are not a problem for you, then this is a great product. It's easy to sync, easy to use, and voice recognition works just as great with the headset as without (on my e815).