I only went the first time, and didn't learn anything new - BUT that was no fault of the class. The ante-natal classes I attended were really good and covered everything! It was just that by the time I went to them I had already researched all the information or learnt it from BB before I got there. My hubby found them very informative and I am considering going to some classes now with our third, not for myself but for my DH who doesn't know as much as me and who has forgotten some of the basics but doesn't want me lecturing him.

I think how much you get from a class can depend on how much information you are going in there with. The classes have to cater for those who don't know anything, so those who know a little can sometimes feel like they aren't getting anything out of it. Unfortunately (or fortunately depending on how you look at it) those who visit BB do tend to be better educated about birth then the general populous and as a result may not get as much out of the class as others who don't go online.