I didn't mind Shia LaBeouf being in the movie, although, I've read some very strange stuff about him and his "method" acting. I think there is some unwritten rule that 75% of successful actors must go a bit crazy. But back to the movie, it's a pretty dark and bloody story about the prohibition era.
One of the most interesting aspects of the movie is that it was actually based on a true story. Trust me after you see it... you'll be surprised. But some the craziest stories are the ones we didn't make up. Lawless is based off the historical novel "The Wettest County in the World."