I started with a Nokia bluetooth earpiece that was awful. I could hardly hear the people on the phone at all. Moving to this device was certainly an improvement over that. All in all it was a nice looking unit and the battery does last forever. When it does finaly get low, there is an audable beep that lets you know that it is time for a recharge. You know it is charging because the blue light comes on and stays on until it is fully charged. It could be quite startling when using the earpiece in a car at night as the blue flashing light reflecting off of the glass was exactly the same color as a police car light! I learned quickly to open the mic and put the unit on while pushing the button to answer a call. It is quick and fairly easy to put on with some practice. However it does flop around if you turn your head, and if you wear glasses it becomes signifigantly more uncomfortable.The biggest drawbacks for me are the difficulty hearing callers. I have exceptional hearing, and I am constantly wishing I could turn up the volume. Also people who call me often complaied of static. I wore the headset on my left ear, and I found I had to have the phone on a desk in front of me, or on my belt right over my left front pocket of my pants. If I wore it on my right hip, or even on my left hip under my arm. My own body was enough to block the signal. I had to have line-of-sight between the phone and the earpiece. About once per week, the headset and my phone (Treo 650) would mysteriously uncouple and I would need to mate them again. and the last straw was when the microphone on the headset quit working just as the warranty ended. I can still use the headset to listen to voicemail, but that just isn't good enough.