I got a bluetooth phone in November and since then I have been reading reviews on different bluetooth headsets. Most of them had awlful reviews like you couldn't hear or the other person couldn't hear you but when I looked up the Plantronics 640 it had the best reviews of all so I ended up getting it. I had some problems at first with getting it set up because the instructions weren't very clear but I took it to the Cingular store in town and the guy did it in like 10 seconds so I guess that if you know what you are doing it would have been easy to connect to your phone. I can hear perfectly, I have had no problems with range or how close I am (within the whole 33ft thing) and other people say that they can hear me good. I recommend this for anyone.Pros:great volumecomfortablefits ear perfectlyvery light weightother people can hear meCons:not very good instructions for beginners