As far as Palm OS is concerned the Centro is technically the most powerful in the line up and is therefore capable of doing vitually everything other POS Treos could do (although grafiti isn't native you have to download some hacks). The main complaints are either the size of the keyboard or the screen or both. Personally, a well decked out Centro is really awesom. With the price of MicroSD storage coming down you can put lots of data on it too.