I use the keyboard with my Vaio (4 1/2" screen) because the thumboard is tooooo small.It makes a great product out of a product which is marginally usefull without an external keyboard. It installed easily, worked the first time and is really cool, plus I can use it with my PDA if I want to. Pair this with the MoGo mouse and you have a complete tiny system. James Bond couldn't do better!