I am switching from a T-Mobile MDA. I just got this phone from amazon with a new 2 year plan from sprint. I got the phone for free as long as I pay my bills on time. I am a big fan of the palm OS. It is a bit old fashioned but very rugged and crisp. The display is small but sharp. I got the vision unlimited data plan, it is nice. It even works in my office building which is a giant old brick building. The palm desktop works on Mac OS X seamlessly. I do not use it for mp3 simply 'cause my iPod beats it in that arena. It fits right in my jeans' front pocket.