For several years I used a Logitech Bluetooth for my cell phone, and while it worked great, it was always uncomfortable. When it snapped in two, I decided on the Voyager 510! Wow, not only does it work great, but it is VERY, VERY COMFORTABLE! In fact, I can honestly say I actually forget that I am wearing it, something I cannot say about my previous device. So for all of you thinking of a headset, you cannot go wrong with this one! Five stars!