The CBFM is only good for cycles 28-42 days.
I've got one and I personally don't think it's right for me. I never got a peak on it to indicate ovulation but I get positive OPK's and BBT charting to confirm ovulation. Even this month I didn't get a peak even though I have ovulated.
Some people find them fantastic, though.
If you have irregular cycles like I me I think it would be well worth the money! I find it hard to pin point my ovulation day and have missed a couple of times and also been to early on other occasions! it definately helps give you an idea of whats going on if nothing else! If you have been considering it for years I say just go for it! nothing to lose!
x
Deffo get one. I used it with my 1st Lo and got a BFP on cycle 2
I'm using it again TTC our second and hoping to get BFP this month