This mouse is awesome. If you are an avid gamers, especially someone who plays 3D shoot-em ups like Quake etc. then you have to check this out. The Razer Boomslang 2000 (which probably should also be awarded the trophy for strangest name as well) is an essential peice of kit for you. The fluidity of the movement is amazing, with none of that jerky mouse movement across the screen which you can see with your normal Windows based efforts. Just watch how your skill and accuracy improves thanks to this mouse's precision - its simply amazing. I also like the way that it can be connected either to your usual PS/2 port or to a USB port which should in theory make the movement even smoother slthough I haven't noticed much difference between the two. Ergonomically its good as well, being comfortable in the palm of the hand(left or right adjustable)and with plenty of strategically positioned buttons to turn you into one awesome opponent. Personally I run Windows 98 and the installation etc. went pretty smoothly and I haven't had a problem with it since then, but I can't say how well it works on other platforms. I would image Win 95 would be OK but 2000 and NT may be a little more suspect so I suggest you check this out before you buy... ...and I DO RECOMMEND THAT YOU BUY THIS MOUSE! If you are a serious gamer then you'll wonder what you have been missing out on before you bought this mouse. The difference between using this and your usual mouse is astounding - I couldn't believe it myself, and I'll probably never revert back to a 'normal' mouse again to play games with. It is quite simply the best around for gaming and as such can not come more highly recommended. BUY IT!