This iGo Stowaway keyboard is nothing short of a technical marvel. I have used the keyboard on two different PDA phones. It is easy to setup and the manual explains the procedure step by step. This is a "wow" kind of device that works flawlessly. Both of the PDA/phones I used it with had slide out keyboards good enough for brief messages, but for real typing nothing beats this mini keyboard.Astonishingly, production of this keyboard has been halted and it is no longer available from the manufacurer so whatever inventory is out there is all there is. I was able to purchase the keyboard for half price at the time it was discontinued. The $100 price is high and I think it is the same as the MSRP set by Stowaway. Given the limited availability, it is unlikely to be found for much less. If you absolutely need to do serious typing on your PDA/phone, this keyboard would be my recommendation.