I started back in 1994 or 95 with a 6100/66 dos compatible machine and it didn't work. I have tried Virtual PC and it was so slooooooow. I tried all sorts of beta software and they didn't work. This is the first bit of software that works so beautifully that I cannot believe it. I use one specialist bit of software that is only available on PC and everything else is on the Mac. I only need it for that one bit of software and Parallels is nothing short of genius. The Coherence mode is stunning. It is the best of both worlds for me. I feel sorry for the poor guy who lost his data but it has worked flawlessly for me. I can highly recommend this software. Another recommendation would be to just run any old version of Windows and not try to do Vista. Vista’s advertising is "The wow starts now" but for Mac users the Wow started years ago. Why would you bother installing inferior software than you already have, just use the Mac and run Windows only when there is no alternative.