I saw this yesterday afternoon. I enjoyed the first act and the second half of the second act. Thought the first half of Act 2 dragged a lot. I don't regret seeing it -- as a Thursday afternoon performance, I didn't see this instead of anything -- but felt that I would not have been happy if I had driven in from NJ (where I once lived), paid $15 for the tunnel, endured the horrible traffic, paid another $50 for parking, etc. It just wasn't good enough.
What was good? The performances of the 4 leads were all very strong. Anika Larsen made me remember Frances MacDormand...in a good way. Don't have my playbill in front of me, so I will simply say that the young man in the lead was TERRIFIC...lots of charisma, great voice, good at comedy. CAST HIM AS MARTY McFLY ASAP. The performers who played Russell and Penny were also very good, as was most of the cast, although I did not love Drew Gehling's performance...he just didn't seem right for the role. I kept on seeing Dr. Pomater and Dave. Maybe he was just a tad too old.
I thought that several of the new songs were good, including the opening number, one sung by Penny and one sang by the mother, but a lot of the others made no impression.
So, it definitely was not bad -- I have seen a lot of bad and very bad musicals - it just isn't exciting enough. Ultimately, I think the music let it down, because I thought the book was solid.
Saw both Tom Kitt and Cameron Crowe in the audience. Crowe seemed to know an awful lot of the attendees.