I got the 6400, and it works fine. It took me about a day to get used to the pressure thing, but I wish you could turn it off if you wanted. I don't think the F keys work. I set them up to my keyboard F9, F10, F11, and F12 (ExposŽ and Dashboard), but when I hit them nothing happens.

I'm only having one problem, and it's a big one. I went into PS and started writing out my name (Steven) and went back to cross the T, and there's this huge lag. After about 10-20 seconds it finally crosses the T. The funny thing is, it only does this in PS, which was the main reason I bought the tablet. Anyone else have this problem, or know how to fix it?