I have the webcam for some weeks now, use it now and then for video calling and so far I'm satisfied. Good video, the brightness adjustment works well, as does the auto-focus - even with standard Windows drivers. The Logitech software can be downloaded from the website later - so you need not do without them even in the OEM-camera. The built-in microphone is, as a relatively cheap camera not to expect the best, but adequate.
So all in all: Good value, nice camera with moderate micro.