The only real problem with this headset is how large it is.  I have small ears and it barely hooks around good enough. It can take me a minute to get the top part of the loop over my ear just right to get it to stay.  For normal size ears this should not a problem.  Other than that this thing actually works pretty well!  Even the other Plantronics and different headsets that I've tried (610, Jabar, nokia 810) will disconnect or crackle if you have the phone in a lower pocket on the opposite side but this one almost never does.  Just keep the phone on the same side as the headset and it should be good.  Despite what one person said, of course it comes with an AC charger.  That person should return theirs for another, properly packaged one with the charger.