The trailers pitched a slasher, horror film, but Shutter Island was so much more. Dullards are whining online because they didn't understand the end. Uh, that's the point. Good creative work leaves the perception up to the viewer. How did this film end? It's up to you.
Like fine wine, Martin Scorsese is aging beautifully. The work and his art keeps getting better. Shutter (or should it be 'Shudder') Island is a brilliantly crafted and acted psychological thriller. A whodunit, a riddle wrapped in an enigma, call it what you will, but see it and decide for yourself.
Talent wasted, not particularly professional... if you saw the trailer, you saw all the good special effects. Script was pathetic, huge plot holes and absences of logic. Save your money!!! Shame on this director.