My mom and I saw it together last month. I hadn't read the book or seen the movie beforehand. She had read the book and didn't like it, but wanted to give the musical a chance, mainly because she's a fan of Alice Ripley's. (For the record, so am I.) I liked it more than she did, but we both liked it more than we were expecting to. It was completely different from anything else we've seen, which I appreciated. A bit too gory for my personal taste (especially the act 1 closer), but I thought the music was great and the psychological aspects were very interesting. Immediately after seeing it, my thoughts were mainly, "...I think I liked it?" But as the week went on and I thought about it more, I realized that yes, I did like it. I was hoping to catch it a second time and pick up on some things I may have missed, but sadly I didn't get the chance.
"I have maggots in my scrotum!"