I can't compare the two because I didn't try a class but I loved the Hypnobabies home study cds. I listened to them obsessively from about 20 weeks on and found them to be so relaxing and soothing. I had no fear at all going into labour and birth, only positive excitement. The only thing that kind of disappointed me is that I didn't consciously use what I'd learned, nor did I listen to the cds while I was in labour. I tried to listen but the woman's voice, which just a few days before took me right to my happy place, drove me insane once I was in labour. I had to turn it off. And labour took me to an entirely different place where I forgot everything I'd learned. However, I loved every minute of DS's labour and birth, despite it being 40 hours and there being a few complications. I have nothing but wonderful memories. So I think that the Hypnobabies really did help me, I just wasn't aware of it in the end. Hope that makes sense and that it helps.
Happy mumma to my boys Henny Tom (Nov 30, 2008), Arlo Odie (Oct 5, 2010), and baby SISTER! due mid-Dec 2014.