Good to hear!!
I thought it was funny that your DH and MIL think you don't need anything other than the hospital classes. The calmbirth course is so much better, and a completely different focus to the hospital classes. We only did the hospital ante natal classes so we could have a sticky beak around the hospital more and to get a feel for how they generally do things as we had no idea what to expect.

I'm sure you'll get a lot out of it.