This is an update to my earlier review. I made the mistake of purchasing another one of these to replace my first one. The real problem with the first is that battery life when downhill really fast. Within the first month of the first usnit dropped to 90 minutes of talk and 3-5 hours of standby. Leave it turned off but off the charger overnight and I had a dead battery in the morning.Well after seeing all the glowing reviews, I decided I must have gotten a bad unit and bought another.This one failed in a similar way to my first unit, only worse.In addition to the abysmal battery life, it will frequently lose the signal and spontaneously un-sync from my Motorola V3 RAZR.While the sound quality is good, the sharp decline in battery life and frequent loss of signal makes this a completely unreliable device. Unreliable = useless.Now I have a different conclusion about all the glowing reviews. Everyone wrote them after first getting theirs. Yes it is great out of the package. But after you use it for a while, it wears out.My experience is so bad, I am beginning to wonder if the whole Bluetooth thing is not practical for a small device.Review from March 31, 2006----I find this so-so. The sound is good and I had no problems at all with the mic pick-up - while the battery lasts.This device DOES NOT hold a charge. If you charge it and do not use it, the charge leaks away in only two or three days.When I do use it, only after a fresh charge, I get 90, maybe 95, minutes, of talk time and that is it. But only if a I make a single call. Make a series of calls, and that will cut down life to an hour or less. I have never gotten more than 8 - 10 hours standby time. I did get 6-8 hours of talk time when I first boaght it. But after a only ONE week of use, it went down to the current 90 minutes.The short battery life gets it stars.