I'm still troubled by NFP.
We Catholics should accept children lovingly as a gift from God. I know no artifical means are used to prevent pregnancy, but we are actively working to prevent conception. I would like to see NFP as a way to increase the chance of conception.
But, as the father of five who wanted nine, I am probably in the minority here.
When I was growing up, we had a "marriage course" in high school which explained Catholic teaching (taught by a priest who was later kicked out for engaging in an illicit affair with a woman). Since the administrative structures of many dioceses have done a very poor job policing their own staff, these kinds of programs need to be watched VERY CLOSELY.
I believe the Catholic divorce rate has actually risen during the postconciliar years of the experimental marriage encounter weekends, pre-cana, etc.