I watched this not knowing what to expect and honestly not expecting anything. I only watched it out of curiosity after picking it up three times at the video shop (on three seperate occasions, three's the lucky charm I guess) and I have to say I'm glad I rented it. I enjoyed it and for me, the fact that it was based on a true story made it more interesting. Also I found the 'transformation' actually one of the best werewolf ones so far surprisingly.
I have to say though if you are expecting a real thriller/horror sort of movie you might just be disappointed. Keep in mind that this was about a man who thought he was a werewolf not an actual werewolf film (werewolves don't exist obviously) so probably more of a drama on the verge of thriller then horror.
8/10