I just bought the Logitech c920. It works beautifully. However, it has a nasty habit about defaulting back to the webcam's built-in microphone, which sounds absolutely horrible... :-( I have a Samson C03U USB multi-pattern condenser microphone that sounds amazing, but the Logitech software constantly reverts back to the webcam mic. I disabled the webcam mic in the computer's sound settings, and this seems to have remedied the situation. Has anyone else had this problem?