I have long hesitated before I chose because of the good reviews for Parallels Desktop 6. And I have not regretted it. The installation was well explained and easy Windows XP (not included, you need to have or acquire additional) works just fine. In SP3 of XP I have the benefit of performance waived by the way. Of course, the computer (iMac 2.6GHz, 2 GM RAM) is not faster when Windows is booted. Windows games with complex graphics are probably not run and who ever wants to run both systems in parallel, should be at least one more memory and maybe a faster processor use when I. But anyone who just needs the opportunity to decide for using the same files and directories occasionally on "normal" Windows applications back and Windows then can finish in order to have all the hardware resources for OSX available, which is with Parallels Desktop 6 well served. Had I known how easily this works, I would have switched earlier to Mac.