The New-Age Treo's are the best smart devices ever made! I have used the T-Mobile Sidekick, the AT&T Motorola MPX, a Nextel Blackberry, a Samsung i600, and even an older style Treo in the form of the Treo 300. And out of every smart device I have ever used, the Treo 600 and 650 are 1000 times better then any of them!