Eli Roth... the name alone brings a bit of a shudder. Cabin Fever may have been an interesting choice, but Hostel only feels like the degenerate project of a teenager who hasn't grown up yet.
Tired formula, predictable plot (if any), waaay too gory scenes and just about every dumb decision a character can make, these guys make them. At least the horror atmosphere is very well rendered as well as the visual spectacle of visiting another country through the lens of a more than capable cinematographer. Giving credits where credit's due, Eli Roth's directing may be a bit better here than it was on Cabin Fever... and it got even better on the Hostel sequel... so there's much hope.
In terms of special features, what the 2-disc DVD edition contained has all been ported over, so there's close to 2 hours worth of behind the scenes material, deleted scenes, goofs, commentaries, etc. You're in for a treat as many secrets are revealed about the making of this movie.
Fans of horror, you will most likely want to jump at this opportunity. It has all the qualities "Saw" had yet doesn't delve too much into the "let's kill people all the time for no reason". Here at least you get a semblance of care from the writer/director. Other fans who like suspense, thrillers and such would best rent it first.