I've used it and it worked fine, felt a tad slow to me too.
Because I was going back and forth between Mac and one Windows app it felt kind of clumsy, especially because of the different keyboard layouts. Because of that I eventually gave up on that one app (too lazy to delve into changing the keyboard mapping). I did manage to keep all my files and data on the Mac side pretty easily using Windows Sharing in System Preferences.
Seriously? That's what you're going with? I prefer this tiny ad: