I don't know, it might have been my attitude going into it, or I might just be trying to be contrarian in the face of all of my film-geek friends, but the concept got stretched a little too far for me as soon as they started talking about limbo (wouldn't a sedative make you dream less?). Memento seemed so clever and simple to me, and this sprawled too much for me to enjoy it in the same way. I'll give it another try next week and see how it goes.