Just wanted to pipe in here. I used hypnobirthing for my first birth and hypnobabies for my second. I really like both programs. I think the hypnobabies program is a more complete program for two reasons. The first is that it includes the childbirth education portion instead of just hypnosis instruction. I don't agree with everything she says, but it is a really inclusive program, and that is nice. The second is that the hypnosis program is incredibly more complex and thorough.
I would like to say, though, that I think the complexity of the hypnosis program is a double edged sword. It takes a significant time commitment to get good at it. I'd already had one successful birth using hypnosis but when my second DD was born, I never felt I was "good enough" at hypnosis to use the eyes open part of it even though I practiced a LOT. I still had a great birth using hypnosis, but it wasn't all that, you know? Because of this, I am inclined to think that the hypnobirthing program is EASIER to learn and feel really confident about, especially if you don't have a ton of time to put into it.
Having said that, I did choose hypnobabies again for this birth because I think that even if I can't master everything, I like having a larger arsenal of tools to use during the preparation and birth.