The only disadvantage is the Logitech anbiedet no additional drivers for it. Thus, not all functions as with other webcam's are available.
The webcam is performed at Logitech under two names. 1. Logitech TV Cam for Skype 2. B990 HD Webcam
The model number is for both M / N: V-u0022
But if only one looking for Cheap Webcam Skype etc. can be accessed here.