Its an enjoyable film but its completely transparent and you can tell what the twist will be almost from the very beginning.
the film changes after the first 3 watches. I dont believe you saw him subliminally appearing with the cigarette burns at the character changes (for example) the first time you watched it. Marla changing from freak to victim, etc. Maybe you did but Id be amazed.
IMO its one of the best films to come out of hollywood in recent memory. Writing 3 movies into one which makes the movie change on each of the first 3 viewings is afaik unmatched.