I find mine great, I get some ferns leading up to ovulation and on the day of o I get full ferns then some ferns for about 2 days after. Like others have said it a personal thing not everything works for everyone, I also found it cheaper in the long run with maybe baby. But like other methods it does need to be used correctly or you won't get the right results.
In the end it comes down to you and what works best for you.