Who's seen it, then? It's on Netflix. I watched it New Year's round a friend's house.
I liked it, but I wouldn't say that I loved it. Not as funny as I expected although I did enjoy the satire and as you mention some of the performances are excellent (I particularly enjoyed Ariana Grande taking the mickey out of herself and Mark Rylance).
If you have watched it and turned it off at the credits - it's worth sticking around for the two extra scenes.