I've used the treo 270 (flip up top) and the treo 600. I really like the 600 with all the palm features and programs that can be downloaded to the phone.With the 270, the flip up top broke off when it dropped from the kitchen counter to the floor. And now my 600 dropped from my hand to the floor(about 3 feet)and won't work any more. For such an expensive phone, it should be manufactured to be more durable.