I read all of the reviews on the various Bluetooth headsets that were tested with the Treo 650 and the palm one device seemed to be the best fit so I bought it. Overall it works pretty good. The talk time and standby times are amazing and if you do need to charge it on a trip it uses the same charger as the Treo 650 which is nice.The best feature is that you never have to touch it after you turn it on and place it on your ear. You can silence the Treo and when you receive a call you hear a gentle ringing through the headset. You can then answer the call through the phone and disconnect without ever touching the headset. This is MUCH easier than the Jabra 250 which I had previously.The only reral complaint is the loose fit. You really have to watch how fast you turn your head or it will flop. The volume could be a tad higher also. All in all a good device to use with the Treo 650.