Just started using mMorphCut from MotionVFX today on a simple set of interviews.
Had to put the word out on it because it is just fantastic. I know there are some other options in this area but I would have to say that this is by far the best $64 CAD that I have ever spend on a plug in. I am able to put edits in that I wouldn't even have attempted before, and it's making my interviewees come across really well, and cutting the project time down significantly. There is a free Demo so I highly recommend this plug in.
I just finished four interviews where I used it extensively. There is a limit to what it will do - if there is too much head movement between clips it looks unnatural. But with reasonablely small movement it's great and with tiny movement the cut disappears.