I have been doing it and just completed my 4th week. Since I stalled on the bench I took some days to work only the muscles that support bench pressing. Overall I have seen improvement in strength and an increase in appetite.
I really think it is a great program and I hope to do it 12 weeks, go to the 3x3 program and maybe revert back. I know this doesn’t answer your question but I just wanted to encourage you because it is really a great design. Looking forward to what others have to say, also to the answer to the questions.