After watching "Martyrs" and "The Inside", it's easy to understand why one would dub the French Horror films as the sickest, vilest and most sadistic. The Pack, on the other hand, isn't as shocking or as well-made (well made as opposed to good, as I didn't really like The Inside).
The build up is actually rather nice, regardless to a pretty much non- existent exposition. It starts up as another Torture-Porn/Occult film. Unfortunately everything goes downhill from there. The story is simple and not original, with some details having very non convincing explanations. The screenplay and script are lacking, and the ending seems extremely non related to the plot, leaving the audience not bewildered as much as annoyed and feeling cheated. The cinematography, shooting and effects are simply cheap, making the low budget very apparent. I didn't mind the voldermort's nose looking "monsters", I did mind the painfully obvious and visible masks...
However, I must say the characters were very good and the acting was excellent, especially by the supporting cast (i.e the three bikers). Also, an excellent soundtrack! Do these make the film worth watching? Not really. This is one of the very very very few times when I agree with IMDb's rating. Good looking actresses and fine acting can be found in countless other films, and this one simply isn't good (in my opinion of course).