It baffles me how many people think that the German twins wanted to be conjoined. That was never even mentioned. They wanted a limb exchange and 3D implants.
Overall I thought this movie to be amazingly clever, beautiful and in all honesty, pure genius.
One of the best, if not THE best horror movie I have seen so far and it's going to be pretty hard for any filmmaker to top it. Then again, I am kind of a fanguy when it comes to the Twisted Twins.