Having bought this webcam for a new computer I'd ordered, I first tried it on my existing one. I found the installation to be very easy, with no problems. The picture was very clear, with decent framerates and automatic adaptation to different light conditions.
However, I was unable to use it with my new computer, which uses Windows XP Professional x64 Edition, since Creative haven't bothered to spend a few hours making a 64-bit driver for this product (and say they aren't going to do so in the future). I'll have to return it now and buy something else. So I strongly recommend this product for regular 32-bit versions of Windows (if you don't know what you have, you have this version) but it's a no-go for x64 users.