I bought the DVD a few weeks ago and I thought it was great. Probably not for everyone but I thought the ending was pretty fucking twisted actually. I thought that might happen but was still surprised when it did!
Tobin Bell has one of the creepiest voices I've ever heard. I watched it with the director's commentary and he said he did very little to alter his voice from its natural sound.
I was surprised by the minimal amount of gore. The trailers made it look like it was going to get pretty nasty but there is only one somewhat "over the top" scene that I can think of. Good flick.