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My sister has it on her PC, it basically skins windows to look like Mac OS X Tiger. It does an ok job, but you can tell it's still windows though. It does slow down her system a bit though.
 
I used it on my work laptop for a while, it drove my bosses nuts. I found that it really slowed my system down and there were still some of the underlying Windows problems. I finally ditched it and the computer it was running on and convinced those same bosses to pony up for a MBP. Now it's OS-X completely native, the way it should be.
 
Although I hate windows more than any one else on earth, I like it to look like windows when I use it. I did use that once on a high end desktop and it done a pretty good job.

Problem is its only a skin and cant mimic the mac exactly.
 
I installed it on my works XP machine last week, but it stopped itunes from opening so switched back - shouldn't have been using it in the office anyway :p
 
I used it for quite a few months of waiting for the Intel iBook...it never came...
I'm not that stupid, of course I got a Macbook when it came out
 
I tried it on my old PC. It looks okay but it performs nothing like the real OS X :p
 
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