I've been a loyal Parallels User for their first two versions. However, there are two things that drive me crazy with Parallels:
1) Too many keystrokes are passed back to Mac OS while running in full screen mode. For example I use Shift-F11 in Visual Studio a lot and I had to remap it to Ctrl-Shift-F11 to avoid the slow motion reveal desktop.
2) Idle mode performance is abysmal. When XP is sitting idle, I regularly see CPU utilization > 25% over both cores. Needless to say that this kills battery life while working in Windows.
So far, VMWare Fusion Beta 4 is very usable. The annoying keystroke passthrough behavior is not there (yay!) and the idle time performance is much, much better - I'm seeing < 20% across a single core right now.
Looks like a keeper.
