I’ve tried both Parallels and now VMWare’s Fusion on my MacBook Pro for running Windows.  Parallels is fine.  VMWare is great. 

Why?

For one, having a coherence / unity mode that works with expose is way more important than I thought it would be.  For two, its faster to get up and running and faster when you get it up and running.
For three, its a way better name.
…
I can’t list any more reasons, because “For four” is just too stupid for even me to write jokingly.

Chris Pirillo agrees with me.