Watched this one over the weekend. Took me 3 tries to get through it because it's 2h40m long and slows down a lot after the first quarter.
Pros: Stunning replication of how gritty day to day life can be for everyday joe's and also how things can go so bad so fast even with the best of intentions. The first person perspective shots (most of the movie) were also well done and intimate.
Cons: 2h40m long. Couldve been done in 90m. Thought the climax of the movie was too early and couldve been flipped with a scene later on in the movie that showed it from a different perspective. Also, the novelty transitions got used way too many times (aerials, dive-ins, etc).
I'd recommend it though, especially to casual/recreational drug users.