This was "watchable" movie but not a great one. This fictional history of a Chicago based biker gang was rather thin on plot or character development IMHO although there were some good performances.
The standout performance was Jodie Comer as the reluctant biker chick and narrator Kathy, who seemed to be one of the few fleshed out characters in the film. She delivers an authentic portrayal as the wife of Benny, the sexy rebel and wild man of the gang, sadly resigned to her man and his unpredictable and often violent life and delivers it with a spot on upper Midwestern accent ( If they make another season of Fargo, which I'm sure they will, she needs to be cast in it 100 percent!). Micheal Shannon as gang member Zipco also gives a believable and heartfelt performance and steals most of the scenes he's in.
Besides that the male lead, Austin Butler's Benny, has the Marlon Brando surly rebel stance down but doesn't say or reveal himself much which gives his character a sort of hollow feel. Tom Hardy, who plays the gangs leader Johnny, gives a somewhat interesting performance as a guy who created a beast he can't always control, especially towards the end of the film. Still, even he feels more like a sketch than a full blown character.
It doesn't help that the movie obviously imitates Goodfellas down to the character narration but falls short of of being nearly as compelling. Another thing I found off putting about the movie was the lack of real Midwestern accents, Ms Comer aside. Some of the characters seemed to be speaking some kind of New Jersey accent and having grown up in the Midwest I found that annoying.
I think more fleshing out of the story and the characters would have made this a better film and perhaps it might have worked best as a 10 episode TV series.
Overall it wasn't a terrible movie yet little of it stuck with me in the end.