Hi Nat, glad to hear it's going well, not long left now!!
My antenatal classes were fine, didn't learn much more than I hadn't already found out for myself but they were still useful. Don't be afraid to ask questions - you'll find most people want to ask the same thing but are too scared!
It's also nice if your partner takes an interest - there was one couple at my classes, and he was the one asking all the questions, she didn't say a word. Not at all like my husband who was reluctant to go cos he thought he knew everything anyway.
It's nice getting to see the delivery suite and all that as well as at least then you have some idea of what to expect when you go in! Not so nice was when they passed round the various instruments that sometimes get used, like the forceps or that weird knitting needle thing they use if you need to have your waters broken (like me)!
Enjoy it and let us know how you get on. xxx