Although the trailer makes this look like an action movie, it's not. It's a slow-moving, gradually unfolding psychological profile of Dave Brown, a crooked, law-unto-himself L.A. cop as his world begins to collapse around him.
Whether you get 'into' it really depends on whether you can relate to Woody Harrelson's character. I struggled to- it's not as complex a character as it could've been, and rather too one-dimensional as an old-fashioned cap. As a result there wasn't much sympathy. A tragedy in which you don't really care about the central character is a bit of a failure.
However, despite that, there are redeeming features of the movie for sure. The supporting cast are all excellent and really seem to get their teeth into the gritty, hyper-real atmosphere; special mentions should go to Anne Heche and Cynthia Nixon as sisters of Dave Brown's dysfunctional family. If you're a Steve Buscemi fan, don't get too excited- blink and you'll miss him.
The extras are average. The behind-the-scenes half-hour featurette tells you a few interesting things about the improvisation element of the movie, and some of the planning that went into the cinematography (which does help show the movie in a new light- almost literally), but it gets bogged down in the usual gubbins of actors telling you how good the director is, and actors telling you how good the other actors are, and how unique an experience working on this movie was, and all the usual stuff. Interviews and the trailer are a thorough extras package but not especially inspiring.
Good in parts, but overall just a bit too ploddy.