Firstly, there's something I must make clear. Vulgar is NOT a Kevin Smith movie, despite it being a View Askew movie. Kevin Smith co-executive produced it and played a bit role, but he did NOT write or direct it - Bryan Johnson did.
That said, I was quite impressed. I rented it not really knowing what to expect; I mean, the only View Askew works I'd seen thus far were Kevin Smith's, but I could tell this would not be the same comedy fare just by looking at the cover. I think it's important that you do not expect to laugh while watching this movie; there are a handful of funny scenes, but that's not really what Vulgar is about.
Brian O'Halloran gives an amazing performance in this movie; I don't think many actors would be brave enough to take on the role of Flappy/Vulgar. For the most part, all the actors are very believable, which is necessary in a film portraying a reality this stark. The cinematography was superb, and the script was well-thought out and solid. Some of the sets were a little drab and lackluster, but I won't hold that against it... hey, it's an indie film.
All that said, Vulgar is a twistedly brilliant film, but it's not for the faint of heart. The final 10 minutes of the film really had my blood pumping - kept me guessing. I recommend you rent it first and test the waters before you buy it.