All user reviews for the Logitech HD Pro Webcam C920

Camera is a big step up from basic models, has a Zeiss lens and focuses fast enough for most uses. Good in low light.
Audio is better than your computer's built in mic, but for any serious uses you will want external mic.
With the arrival of the C922 prices are coming down on the C920 below 50.00, and the improvements in the new model are marginal at best, making the C920 a continued good value.