I have really mixed feelings about NCT courses.
I don't think I learnt anything from the course. All the information is out there in the media (and on Mumsnet!) these days so if you are obsessive proactive and google pregnancy and baby stuff lots then you will already know what they cover in the course. However I think my DH found it a bit more informative than me because he wasn't obsessively reading up on everything like I was! I found it reassuring knowing that he had been told some of the information because I don't think we'd have discussed it ourselves. And it did point out the importance of your partner knowing your birth plan and reminding healthcare professionals of it during labour, which I was grateful for when it came to it.
However, I think the slant of the NCT is very natural birth biased and it tends to set you up with the expectation of having this wonderfully empowering natural birth. All well and good, but it means that when things don't work out like that, you feel very disappointed/shocked/let down. As it turned out I did have a wonderfully empowering natural birth, but then had a massive emergency straight after it, which was really scary. In the days that followed, part of the emotions I felt were just complete and total shock that no one had warned me that that might even be a possibility and if it was what would have happened. I know it's no good scaring expectant mums, but I would have felt a hell of a lot more prepared and l feel I would have coped better afterwards if NCT had covered the complications that might happen during or after birth and what goes on when that happened (ie. Room full of doctors, alarms going off, a lot of frantic talk, husband left holding newborn baby for 4 hours whilst I was in surgery, being too shocked and ill to feed the baby etc etc). The course does cover things like c section, forceps delivery etc, but the way it is delivered it's very much "these are things that you don't want to happen and these are the steps you can take to avoid them". I think it should be more along the lines of "you don't want these things to happen and you can do these things to try to avoid them, but actually they do happen quite frequently in a lot of births and sometimes nothing you do will make any difference, it's not unusual and don't be afraid if it happens to you - this is what will take place...." Out of our group of 8, only one woman had the textbook NCT birth, everyone else had some kind of intervention or complication, so you could say that our group was not well prepared for what we experienced.
Having said that, the friends I made through doing the course were AMAZING. 6 of us stayed in contact and still see each other regularly now, nearly 2 years on. Having other people in the same situation as you in those first hard few months was invaluable. It's amazing what a bonding experience it is sharing the trials and tribulations of new motherhood! I personally would have paid £300 just for that (and that's coming from someone who prior to the course thought I didn't need any more friends!). Maybe you can get the same friendships from joining pregnancy yoga or hypnobirthing, I don't know. But I do know I have a much closer circle of "mummy friends" than other people I know who didn't do NCT.
Sorry that was long! But basically a mixed bag for me! If you can afford it, pay the money in the hope of giving you a support network, but don't expect the course itself to really prepare you for childbirth.