I watched it over the weekend and wrote a review in the Last Movie You Watched thread. I hated it for the same reasons that so many others do: it's loud, vulgar and chaotic, the soundtrack is overbearing, none of the characters are likable or worthy of sympathy, it's too long and so on. It seems like everyone agrees that it's very anxiety inducing (by making you feel the stress that the main character is experiencing) and either loves that about it or hates that about it. If that kind of thing engrosses you and puts you on the edge of your seat, the movie may be right up your alley, but if it sounds like it would irritate you or make you uncomfortable, it's probably best that you skip it.