Too long:

Much of the middle part drags. The entire sequence when Leo is in the catacombs and runs into RORSCHAC could be way shorter. Also, the WWII stuff seemed unecessary for the story.

Too convoluted:

I didn't buy one of the major premises of the movie, which is that the doctor would stage such a complicated and convoluted play act just to try and cure this guy.

Vague ending:

At the end, I came away not knowing whether he was actually crazy or not. From a movie going experience, that was little putting the head in, but not really getting to fuck.

I hate movies like that.