An interesting concept, instead of cutting people to pieces, this crazy doctor is going to surgically connect entire people together to create his mad scientist creation of a human centipede. With an element of 2 girls 1 cup to it, the horror is pretty much only in the retarded dialogue and poor acting, and the completely lackidasical approach to facts when it comes to dna/biology/etc etc etc.
Barring that, it's worth as much as watch as it is to make your grandmother sit through 2girls1cup and tape her reaction. The good doctor could have taken it farther in making their appendages move more like a centipede, instead of three jerks, butt to nut.
Well, you'll see what I mean. ROLL TAPE.