I saw this on Blu-Ray (Netflix). Philip Seymour Hoffman is great...everyone else average.
The first half needed more editing, but it picks up pace in the second half. A solid amount of time in the beginning is donated to showing Marisa Tomei's boobs (had to look her name up) and giving a back story, but it just gets a bit long.
Overall it is worth seeing. Not for kids or anyone you don't feel watching violence, nudity and graphic sex scenes with.
Sound quality is almost a non-issue, the movie is mostly dialog. The dialog quality is sufficient. Picture quality is nothing stunning, the movie is a bit stark stylistically anyways.
Overall I'd give it a 7/10. It's actually a pretty good movie, and its reviews are extremely positive. So, maybe it was a bit more mature than I was in the mood for. For sure worth a rental, let me know what you guys think.