I just bought one. The lack of home/pgdown/pgup/end is still frustrating. I must say, it's a great piece of hardware and the double tap/corner "right click" is a great addition. Frankly, the hardware is wonderful.
The software? Frankly, I'd be happier on a "just works" linux, and I'm tempted to research reverse engineering the touchpad for linux - it's quite a nice addition and it would be a best of both worlds scenario.
The frustration is all of the chording for things that seem to merit their own key in my world. Fn-up, down, left, right could better handle screen and keyboard lighting, and put page up/down/left/right up there instead. I mean, the freaking computer controls the brightness anyway, why even bother with single touch? And play/pause and fast forward/reverse?
Home and end don't bother me as much as page up/down, really. I hate finding my place again after scrolling up and down, and option-up/down is annoying to me.
The software? Frankly, I'd be happier on a "just works" linux, and I'm tempted to research reverse engineering the touchpad for linux - it's quite a nice addition and it would be a best of both worlds scenario.