Well, I had it for a while, and it seemed to be pretty good. But I soon found out you couldn't use DOS programs on it, when I tried to run ePSXe, I switched to '98. If you get XP, you should keep a small '98 partition and use BootMagic or something similar, just in case you need '98 to use something.
XP is much more user friendly, and from what I've heard, is better for 64 emulation. As soon as I get money, and off my ass, I might just go buy it...But I need more ram first.