Bought this camera to add to a system I built up on a Late 2014 Mac Mini (2.6 GHz Core i5, 8 GB RAM) for my office. Video quality is excellent with this camera -- much better than the built-in camera in my 2010 iMac. Reports from others say that sound quality is excellent, so the stereo microphone must be good in that respect. I have noticed a few ways in which in this application at least, it is not up to the level of performance of the built-in camera/mic on my iMac though.
This mic seems to be more prone to VOX opening from extraneous noise than the built-in on that system. I typically run a small personal fan under my desk and often have to turn it off to eliminate "flup flup" during a call.
It is also not unusual that the audio on a call initiated from my Mac Mini will be garbled, and sound like the person I am speaking to is on helium. Parties on the other end report that in that event it sounds like I am on anti-helium (very slow and low (no cultural reference there)). Usually I can disconnect and reinitiate the call to resolve this, but not always. And even if it worked every time, it would be an annoying extra step -- to both parties -- and not very professional.
I am willing to concede that these issues may not be inherent to the camera itself, but a result of the specific combination of components in my system, or a driver compatibility issue. Nonetheless, this is my experience with the unit and in these areas it really is not up to my expectations or requirements.
Addendum: I will be forced to choose "yes" or "no" on the "I would recommend this to a friend" question, but neither are accurate, so here is what you should pay attention to, not that: Maybe. It would depend on the system he or she intended to install it on, as well as how and where it would be used. Newer system, faster system, etc., probably so, especially if residential. Same system as mine, no, whether home or office. Office application, no, unless installed on a much higher quality system, then Maybe. Residential high performance system, probably. As above, I'm not ready to absolutely condemn the unit, but I would definitely have reservations about recommending it to a friend whose friendship I value. I would convey my experience as clearly as possible and then let him/her decide.