I bought the Plantronics 320 today. As soon as I walked out the store,the reception went static beyond belief. The salesman said "Give it a chance", I have and it's going back tomorrow. For the past week  I've bought 4 headsets(Motorola 500,850,700,& this one which is one of the worst. I found the Motorola 700 to be the best so far.  Clear reception most of the time,excellent volume(no problem hearing while driving),& it always connected to my treo 650.  On a windy day my friend on the other end didn't even know I got out the car,hardly any background noise.  I just ordered the 700 through Amazon,much cheaper than Cingular & Motorola.