I also attended the Saturday matinee 4/4 and overall I truly have no idea how I felt about the show.
It's incredibly entertaining start to finish, sometimes in positive and promising ways, other times because it's baffling in many ways.
Tonally, act 1 feels like a horror movie or thriller, perhaps more successfully than any other horror/thriller musical I've seen before, but then act 2 plays like a campy comedy almost start to finish until the (wildly anticlimactic) final confrontation which is over and done in about 2 minutes.
The score is akin to The Outsiders with the volume amped up to an 11. Similarly lyrically unspecific, but tuneful and well performed by the cast. The vocals across the board were very impressive. The standout song for m was Shoshana's "Wild" in act 2. One of the real songs of character development. Can also easily point to at least 2 numbers that should be cut because they serve minimal purpose and at least in one case is so confusingly staged (the superhero number, well-delivered but a moment of REAL camp).
The technical elements are really something to behold, clearly no expense was spared. The set is massive and well-used with tons of tricks and hidden areas. In an era where everything is stripped down and minimalist, it's exciting to see a truly massive set. The effects are well done (save a pyrotechnic late in act 2 that just looked a little silly to me).
As I said before, the vocals of the cast are very exciting, not just the principals, but the ensemble harmonies are really beautiful. The mics can probably be turned down a SMIDGE since pretty much everyone onstage is a vocal powerhouse.
The cast is doing as much as they can despite a number of the roles being very under-written. This is the most I've been impressed with Shoshana Bean, she's trying her best to imbue her role with heart and humanity and provide an emotional center to a show that is SO big. She sounds great, even though her "Be Kind Rewind" song should absolutely be cut.
Ali Louis Bourzgui is really establishing himself as someone to watch. He is just magnetic onstage, sexy and charming smooth as silk vocals and a real star quality to him.
Pierce Wheeler was on for Benjamin Pajak and I thought he was excellent. Would not have known it was his first time on for the role (and his second principal role in less than a week). He was assured, confident, and made the character so easy to root for. Cannot wait to see what he does next.
LJ Benet is solid, I didn't get a real sense of personality or star quality from him, but I don't know if that's him as a performer or the way the role is written.
The rest of the cast is largely good, Maria Wirries has a really powerful voice though I found her a bit lacking in the book scenes. Paul Nolan was...this was not his best work. He isn't given much of a character to play and act 1 felt like he was trying very hard to play at "I'm just a sweet lil nerdy guy" and then act 2 he had to speed-run the rest of his arc. He has his standard "screlt as high as you can in the middle of a song" moment in act 2 and delivers well. It just felt like an uneven performance.
Overall, terribly entertaining but I don't know where I fall on the actual quality of the show. That being said, I'd give this Best Musical before giving it to Two Strangers. Will revisit post-opening and see how the show has been finalized.