I've had my miscroll for over a week now and still playing with it.
The Miscroll is easily rooted using superoneclick from here
http://shortfuse.org/?page_id=2, worked first time, I used the drivers that they supplied.
The ram on the miscroll shows as 160meg, with only about 30 to 40 meg free from starup meaning that memory management is important.
The resistive touchscreen is about average, better than some I have tried but nowhere near as good as a capacative screen.
A wierd thing is that the official market seems to be installed, but it's hidden, not appearing in the installed apps list, I launch it using appmanager and it seems to work fine.
The HD out works well, not that I'll use it much.
Battery usage is average, about 3 hours of video at a stretch.The changeable backs are just a gimmick, but the changeable battery could be useful, spare batteries are about £15 to £20.