Yeah, what Hypernate said.
Seriously though, I've never seen a stable M$ product for the Mac. I purchased M$ Office X through the University for $20.00 (REALLY good student discount), and I only use it when I have to. I never write anything important in M$ Word, because I've lost several documents (in progress) in it (papers, research, etc...). Excel crashes the least, Powerpoint crashes the most, and Word somewhere in the middle. The ONLY thing I use M$ Office X for is compatibility with the Wintel world, and of course, some features or special formatting for word processing. I always use TextEdit for word processing for long periods of time, copying and pasting into M$ Word for the final product. I don't know if anyone else here has had similar performance (crashing) with Office X. I certainly expected more from Office X than M$ delivered, but then again, I only paid $20.00 for it. And it was purchased legally for that low price.