What do you know about NFP? It is highly effective, I am very pleased with experience.
It doesn't have to be one or the other.
"What do you know about NFP?"
enough to know that I'm finished with it.
Finito.
Caput.
" It is highly effective"
Not for me it isn't.
"I am very pleased with experience."
I'm happy for you...it certainly makes life easier to find a method that works for you and won't send you into the fiery pits of hell.