I was going by the 6 reviews on Rottentomatoes (I know, it's not very representative yet), but next to those, I did indeed pretty much only find positive reviews. I'm going to look into it a little deeper today and read what some of my personal favorite critics have to say about it (if they've seen it).
I like Robbie Collin from The Telegraph and he gives it five stars
Also, I didn't even realise that Michael K Williams was in the film until I saw him mentioned in a review, I like him a lot.