Just got this off play.com for my new laptop that im getting this xmas, tried it on my computer, no cd, no fuss, works brilliantly. Its smaller than an average mouse, and it's lead has 2 parts, a thick and thin part either side of the retractable round part. The glow is great, and changes colour every few seconds. Only slight disadvantage is that the in the middle of the wire to the computer, the retractable round part weighs a fair bit more than just wire obviously, so you wouldnt want the wire suspended in the air, as it would pull the mouse off your table.
Overall, a very nice mouse, small, portable, retractable cable that locks wherever you want it too, then you can pull it more and it will lock again, then you can pull it to the end of its length (70 cm long from usb part to mouse) and then it will retract so there is really no wire showing, as it is all safley stored. There is an on/off button on the bottom for if you need to turn the glow off. 2 buttons are good, along with the scroll wheel that also lights up, and can be clicked in.
I would fully reccomend this for a laptop, but maybe not for a computer, as i dont think the wire is quite long enough, unless your computer is close to your mousemat.
I hope this helps, and sorry for the long review, but when im buying a prouduct, i like to know all the details!