I have attended one of her talks. At the time I was a big fan and ready to be impressed. But instead I was quite disappointed. Actually, it was her tape "Contraception, Why Not?" that first opened my eyes. I could see that not only were her ideas muddled, but she was not presenting an authentic alternative to contraception. Instead she was mostly shilling for NFP.
In fairness I must say that the talk I attended in person was superior to her tape. I think her ideas have progressed and improved. But they have not gotten any more systematic. I defy anyone to draw an outline of the talk she gave. It meandered and jumped back and forth. It did not demonstrate the clarity of order that should be the hallmark of a follower of the Angelic doctor.
This is really my problem with the NFPer's. It all really just seems like Catholic Birth Control. I think that that mentality contributes to our overly planned, everything has to be my way culture of death that pervades our existence.
I think if everyone remembered that any sexual act, whether contracepted or not, could result in a child, there'd be a lot less promiscuity and abortions out there.