This is a great little USB web cam for very little money. When testing a dozen or so different web cams, I found this the easiest to use and the least expensive.
This cam does not come with software, and does not have fancy features like zoom, autofocus, and subject tracking. It is fixed focal length and focus, like a cheap still camera.
I found the lack of software to be a plus, as most all webcam software borders on being malware with its invasive and obnoxious effects on Windows. I have not tried it with Linux yet, but will update this review when I do.
This camera worked out of the box on standard Windows camera drivers, and for simple web conferencing, it is great. I have used it with the Elluminate service, and it functions quite adequately.
If you need a basic, generic, USB webcam and don't want to shell out nearly 30 for a good one, give this beastie a try. It isn't fancy, but it works.