Summary: Tech support was LESS than helpful and I knew more than their TECH SUOPPORT reps knew. I can't really recommmend this device as is has a nice picture in high direct lighting circumstances but to get it to work with Logitech's garbage-ware, even the newest download on the web, is really hit or miss. It crashed my PC and I spent 3 days having to repair the bootsector of the PC and recover the MBR record. I recommend interested purchasers find a different device.
Summary: My camera had to be returned due to showing vertical stripes on the right-hand side of the picture in low light conditions. I have previously used two separate examples of the Quickcam Pro 9000 (technically the same camera) and they did not have that problem. Searching the Logitech Forum I found that this is a problem with some of the manufactured examples which cannot be rectified.
Summary: This web cam is over-priced. Similarly specified cams are available at less than a third of its price and the Amazon price is one-third higher than other online stores. The focussing ring on the cam is fiddly and useless. After only a month the one on my cam stopped functioning altogether. I have replaced this disaster with a more robust, cheaper cam bought locally.