I do know that there are women who have better luck with differing forms of NFP.
I originally started with the sympto-thermal, now I just use the creighton method. Sympto-thermal isn't as widely used, but I found it to be the most reliable.
I tried it all.
Keeping track of temp was fairly accurate showing day of ovulation - but didn't make up for the fact that (despite what they keep saying!) sperm really must not die out by the 5th day.
I have a medical condition that has hindered the ability to properly read the sympto-signs.
So basically I'm left with celibacy.