I would say that more or less everything in this movie were mediocre: The script, acting, special effects and more or less everything else. On top of that a couple of things annoyed me, as when the people in the movie tried to block a pair of sliding doors with a wrench through the door handles! Not only once, but TWICE!! How on earth did anyone during the making of this movie think that this could in any way lock sliding doors, and how is it that NO ONE pointed this out during the making/editing of the movie??
For me the transformation into werewolves in this movie did not fit into the timeline of previously established mythology. And since when did canines have eyes that glows in the dark like cat eyes??? Deviations from "facts" like this irritates me a little bit. At least as long as the deviations are not justified and explained.
But in the end the movie was OK to watch. And in spite of everything, I developed a sympathy for most of the characters in the movie, and timed passed reasonably quick (and considering the relative short time this movie lasts, it would have been really bad if it had felt long...).