We have been to three NCT classes so far. They have been extremely informative- my head spins after each class!- and I definitely feel much better prepared for labour and birth. In fact I am not apprehensive about birth at all now and think that NCT is great for giving you a positive take on things in this way. Worth the money? Well it's certainly good value in terms of info-per-£.
There is a strong anti-intervention (ie medical) agenda though. I've always intended to have as "natural" a birth as possible so this suits me quite well. But epidurals, inductions etc are viewed as The Enemy. And one woman who asked if we could talk about c-sections, as she'd been told she might have to have one, was told by the NCT teacher in no uncertain terms that this would be a low priority as she didn't want to focus on "abnormal" (her word) birth.
I think it's great to promote natural birth- but the upshot of all this is that I feel that if I did end up agreeing to an induction, having more pain relief, interventions or whatever, I might feel as though I'd "failed" somehow.
The only other thing which (inexplicably) bothers me is that the whole thing feels very middle class. I'm hardly one to pass comment on this- takes one to know one!- but I do sit there slightly cringing sometimes because it all feels a bit.... smug. I can't really explain it. But there it is.
I also haven't struck up any friendships yet- but then, I am quite shy and find that sort of thing excruciating. Something I'll need to get over if I am to make all these "mum friends" people keep telling me I'll need...
Good luck!