***POSSIBLE MINOR SPOILERS***
Very enjoyable show, but definitely needs some work if they intend to go to Broadway with it.
Starts off very slowly with lots of exposition, and while the snippets of classic period tunes are very welcome, it seemed to take forever to get to the first original song. Most of the best things from the movie translate well to the stage, especially the upbeat original songs in the various '80s styles (The Riddle of the Model, Drive It Like You Stole It, Girls, Brown Shoes). I did find the ballads very low energy, bringing things to a screeching halt, except for a very nice but all-too-brief interpolation of a classic from The Cure. It's kind a weird hybrid of an original musical and a jukebox music, and it almost makes me wish they would totally lean into the latter, using classic hits like "Moulin Rouge!" did to great effect.
I really enjoyed almost everyone in the cast, and I found the staging to be simple but effective (so much rolling furniture, and no crashes!) They do rely, perhaps to a fault, on video projections (thanks, Ivo van Hove!), though it is a great way to handle all the music videos, which appear to be shot live on the stage -- very van Hove. That said, I know they were trying to replicate the low-fidelity look of early camcorder video, but I do wish the pictures were a bit sharper -- maybe they just needed to dim the stage lights more.
Best of all, I think the stage adaptation totally solves the biggest problem with the movie, which was the ending (Ireland to Wales in stormy seas? In THAT thing? Not bloody likely!). The stage show doesn't force us to question the absurdity, and also adds a very affecting final scene that finally gives the brother his due. Seems like with a little more work and a little more polish it could be a huge hit along the lines of "Dear Evan Hanson" (which I didn't like very much, but for sure I'm in the minority there). The young, energetic, attractive,multicultural cast should bring in the young audience, and the '80s MTV-era nostalgia is tailor-made for us oldies. The Boston audience was engaged and enthusiastic, and I hope this production gets the chance to try again in New York.