Just got back from the screening, and it's just as I have predicted: a reasonably decent movie musical that's neither good nor bad, just in this middle ground that I wished was better than it turned out. First and foremost, unlike Amazon Prime's Cinderella which was a bland and boring waste of time, this one at least has the likes of Kaitlyn Dever, Amy Adams, Amandla Stenberg, and Julianne Moore who truly put their best foot forward; and thanks to them acting and singing their parts very well, they are the sole reasons to watch the movie at all. Also the musical numbers "Sincerely Me", "Requiem", "The Anonymous Ones", and "So Big/So Small" are done very well here that they accidentally make the other numbers feel boring and uninspired on a cinematic/emotional level.
Which brings me to Ben Platt, whose look didn't bug me at all as the critics felt, and he sang the role very well as some has said on here; it's just when it comes to transferring his performance from stage to screen, it didn't pay off as he and director Stephen Chbosky would've hoped. It feels like he's trying way to hard to impress and amaze whereas his co-stars come off more naturally on film with their performances than he does, but that doesn't mean he was bad by any stretch of the imagination. Hopefully Ben learned from this experience so he can apply that for his role as Charley Kringas in Richard Linkletter's upcoming film version of Merrily We Roll Along.
So yeah, if this is something you want to watch then go right ahead, unlike other film adaptations of stage musicals that come off as impassionate and bad, this one at least tried to do something special and good. It's just the crew may or may not have bitten off more than they can chew, but this is a better movie musical than Cats so that made me very happy regardless.
And I'm giving this one a 5 out of 10 that's closer to a 6 than a 4.