I set XP up on my brother's gateway box. He has the USB version and it seems to be working ok so far. Personally, I wouldn't buy a USB mouse... ps/2 all the way... I've seen too many problems reported with USB devises and XP. (I have a Lexmark Z22 on USB, no problems, but it's not a mouse or keyboard).
ya, I have the intellimouse optical and it works smooth as can be..but just save yourself the worries and use the USB to PS/2 adapter that comes with it...I hate all the new usb this usb that stuff. god forbid we have to plug something in and actually wait the 2 extra seconds for it to work!
when i bought this mouse, ibought it becuase of the ball-less mouse. i hated the wheel mouse in the sense i had to clean its rolers every week once a week. got tedious.
This one runs literally on any surface including your table, (apart from reflective surfaces like glass or mirrors)
even runs upside down!
the ergonomic design is important to me as i have heavy usage for the mouse.. and this one has been the best so far
with its two extra buttons to go back/foward on the net or on the machine (or you can set your own) i think these were very time consuming.
Overall, the first 2 weeks, the red light will bug you especially if you leave it on over night (the computer). you get used to it and then feel when yuo use someone elses mouse, how you wish the optical was on every computer!
Comes with USB or PS2 connecttions (adaptor) and has no problems with XP.
I would get the Intellieye Optic. Been running mine USB and works great. I wish I had one here at work. Also if you want to spend a little more money I would go with Explorer. Once I build another system I will get the explorer.