I use this bluetooth headset with my personal cell phone (a Blackberry 8120) and my business cell phone (a Motorola v195s).  It was very easy to pair the headset with both phones and it's amazing how easily the headset adapts to which phone is in use.  I frequently participate in conference calls using the headset and battery life is quite sufficient and the voice quality seems to be adequate.  The only complaint I've received from callers is the noise they hear when I answer calls by extending the slide piece, so I just try to answer calls by pressing the button instead.  The volume and mute buttons are easily accessed and work well.  I use the headset without an over-the-ear piece, and although it tends to "droop" a bit during a call, the headset stays well enough in place that it causes no problems for me.  Since this is my first headset, I don't have much to compare to, but it works well for me and I'm not always easy to please.