Fun to watch: When the compactor is in it's final stage and compacts the HDD on host OS, the XP guest is greyed down, if you the go into exposee mode, you get moiree effects from the overlay of two greydown patterns.
It is probably feature We gray the VM screan to emphasize that VM is actually paused during final compacting stage.
And, that's all I noticed... It just worked. It cleaned a hell of a lot of stuff out, I have a 4gb partition that now has 2,1GB free instead of 1,1GB before. WHOW! Can this be? Or didn't I look right before I started? Will give it a try at the office next week with VMWare Workstation 5.5 and both host and guest being XP SP2.