Yeah, I've been taking DD since she was 8 months old, also unable to crawl at that point. At that point I was actaully going more for me than her, but we're now most definitely going for her.
Went through a rocky point in the walking to 2 class as she didn't seem to like it very much and only seemed to enjoy the singing at the end bit, but now, in the 2-3s class, she's having a whale of a time and it's certainly deveopling conficence in her.
Stick at it, it's great.