Just saw this last night and I thought it was overall, a pretty good film. The first 45 min or so are the most enjoyable, and then the film hits some of the pacing issues that Inglorious Basterds had. To the film's defense though, you can't really fault it too much for the pacing because cutting the film to achieve a better flow would eliminate some unnecessary, but extremely entertaining scenes, (the scene with the bag masks).
The film has something in common with the recently released Skyfall in that the main villain doesn't show up until well into the film. I still haven't decided if this hurts either film, but I think if both villains had a bit more screen time it probably would have benefited them, (seeing as each villain is pretty effective).
Also, it seems like Tarantino should have mellowed out by now with age and eased up with the abundance of blood in the gunfights, (which approaches the ridiculous by the end of the film). However, maybe that's just part of what makes Tarantino, well...Tarantino. Afterall, would Cronenberg be the director he is if he suddenly just dropped all the blood and violence in his films?
Overall, it's a good film with a great cast, a good story, and good characters. Haven't fully decided on it yet, but it stands somewhere around a 7 or 8/10 for me right now.