Purchased 11/06 from Amazon. Sound is great, mic works great.It's plenty loud and clear. While a bit large on the back of the ear, it's so light that you don't notice it.As some have mentioned, the buttons are a bit small, but was managable for me.Four months later, I was swiveling the microphone piece around to use the headset on the other ear. There was just the slightest resistance and a slight click or crunch sound. Fear that something bad happened was true. I could hear a call, but the mic and led no longer worked. I called Plantronics customer service, and since it was still under warranty, I was able to file warranty claim online, and within a week, I received a new replacement for free. I only had to send my broken one back on my dime...no biggie.I would consider the Plantronics 645 Discovery as another bluetooth only for the fact that it's a bit smaller. Overall, I'm very satisfied with the Voyager, and particularly satisfied with Plantronics customer service and warranty response.