Adam Schoales’s review published on Letterboxd :
Remember when Foxcatcher and everyone was like "Steve Carell's transformation is incredible!"?
That's nothing compared to Mike Myers' transformation in 54.
This new director's cut restores around 45 minutes of footage slashed by Harvey "Scissorhands" Weinstein (apparently from an old VHS copy) to restore the film to it's original vision, and judging by the Wikipedia entry, features a far superior, un-clichéd ending (seriously, this theatrical cut sounds awful).
While perhaps not as gritty and authentic as Saturday Night Fever (was it authentic? I don't know, I was born in 1988), it's an interesting look into the most famous discotheque in history. True, it does end up feeling a bit like a watered down version of Boogie Nights and ...Fever but there are parts of the film that really work (not least of which including Disco Dottie). Though I'll be honest, the documentary is much more engaging and entertaining.
That said, you can't go wrong with that soundtrack, especially in surround sound.