Once you get that past the horrendous opening and the horror film decides to venture into horror, a good time is nearly guaranteed, thanks to the brothers' murder machines and Glover's delicious dual performance. He's rather theatrical about it, elevating admittedly weak material.
"Gossip Girl" Blake Lively is second-billed on the cover, but don't expect a star turn. She's only in the final scene. Speaking of, I like how it ends.