So far, I have it installed on Vista Pro, Vista Home Premium, XP SP3, & Win7 Ultimate. It's been very uneventful, so in this case, I guess no news is good news.

Had my laptop running Vista on the road with me this weekend, and didn't get any bad bugs when checking into the I-net from motel wireless connections.

Have not heard any really bad things about it in the computer press either. Seeing how most of those take every chance they can get, to bash MS and not much bashing has been heard, I'd say that's another positive sign for it.