Variety calls it a "suspense thriller with a smirk". The New York Times calls it "A werewolf movie masquerading as a thriller" and says, "If it is not as sadistic as the “Saw” and “Hostel” movies, it is as malignant in its insistence on the omnipresence of evil." Of the director, the New Yorker says, "Evans will never be Hitchcock, but he produces enough pleasurable tension to send the plausibles into a frenzy of disapproval." DVDTalk concludes that it's
more about the psychology of a murderer - about a man with a healthy, well-balanced life who's quietly compelled to kill - rather than an excuse to string together a bunch of the usual thriller theatrics. Mr. Brooks isn't a great movie, no, but it's intriguing enough to be worth seeing at least once.Slant Magazine gives it 1.5 stars and says,
Mr. Brooks is bad in countless fundamental ways—it's not thrilling, not incisive, not altogether coherent, and not particularly well shot—and yet there's nonetheless something cheesy-delicious about its lack of inhibition...