I’ve had my eyes on this keyboard for some time since I wanted a better input method for my iPad. The K480 is great as it let’s you pair up to 3 devices, which means I can have it ‘connected’ to my iPad, my iPhone and my Mac at the same time.
An added benefit of purchasing it here in Japan is that I also got the Japanese keyboard arrangement.
The only downside I see after using it for a couple of days is that the iDevices wont respond to arrow key strokes outside of input fields, which means you can’t scroll webpages or the home screen. I minor problem perhaps but still a bit annoying.