I was looking for a USB camera to check out some recent dental work (inside top molars right at the back - v.difficult to get at), so bought one of these. The CD didn't work for me put the supplier provided a link to download the camera front end software.
It basically is very good, the quality of images and focal length seem to be about right - bit tricky pressing the SNAP button and holding it still, but it did the job. The only improvement I would have suggested was an angled or flexible head.
Obviously the instructions are not the best but I found some better ones on the web.