I thought the first Hostel was heading into over-used settings and thematics, but this one surprised me quite a bit by taking us "behind the scenes", if you will, of who decides what happens and to whom. It's quite unsettling, much like the first one, in terms of gore and horror, but this time, instead of following a trio of guys who only come in for screwing anything that has a skirt, we're treated with a lovely trio of ladies who are about to enter Hell, making their future sufferings all the more unbearable.
Although the first movie featured quite a nice video, the sequel feels a few inches under it. Some of the darker scenes really have a hard time showing textures and details, but otherwise, it's as bad as it's likely to get. The sound is very adequate and gives a nice chilly and creepy atmosphere when needed. As for the special features, while the first one featured slightly more, this one's doing a pretty good job.
All in all, if you have only one Hostel movie to watch, I would strongly suggest this one for its visceral tone, it's more mature take on the subject and Eli Roth's great direction for a strong cast.