Saw it on Saturday night. My thoughts are this: it's not perfect, but it's one of the most entertaining and engaging pieces I've seen on Broadway in a while. "Selling Out" is brilliant (reminded me a lot of the "Trader's Song" from Enron, but better) and so is "This Is Not An Exit". I thought the mix of original score / 80's songs would bother me but it works really nicely. Unfortunately, the score isn't very memorable here, give or take a few numbers. But the direction, design and performances are extremely memorable. I have a major boner for period pieces that really commit to the period in which they're set in -- which this does.
Ben Walker is incredible (and very sexy), and while I felt that Jenn Damiano's part was underwritten, she did really well. I'm going to say something very controversial here and say that I think Alice is miscast here. Her voice is one that stands very well on its own, but doesn't blend well with others. I found it to sound really jarring in comparison with the ensemble. Her vibrato is way too heavy at times. As someone who has seen her in the OBC N2N, Carrie in Seattle and this, I can say with certainty that this is far from her best role. Granted, she's not given much to work with -- but she doesn't even work well with what she's got. You can sharpen your pitchforks now for this opinion, but that's my take on it. Furthermore, Patrick's Mom isn't even in the book nor movie so the fact that she's in her at all, along with Patrick's brother Sean--is generous.
The only downside is that I wish it were bloodier and gorier. It's definitely the bloodiest I've ever seen a commercial theatre venture besides Hand To God, much less in a musical. That being said, I still think they could've done more. I also wish it were a little less tongue in cheek, but I suppose it was smart of the creative time to embrace some moments of camp and have the audience laugh with it rather than unintentional laughter (see: Misery and Blackbird). There was a fair amount of gasps from when I saw it, so it's not to say the only way to do horror is with a ton of blood--but it certainly couldn't hurt. After all, the book was so overtly gratuitous. But I still can't help but think they could've done more.
Overall, a solid B+ I'm curious to see what will change on the way to opening.