I don't know man. My friend and I walked out of the theatre with very little to say; other than it sucked the big one. In movie land, this is what they call well-made shlock. The cinematography and art design were wonderful, the actors worked pretty well (I really liked Ben Kingsley & Michelle Williams), and some scenes were really well put together. But the actual source material is really lame stuff, and the twist was convoluted. It also didn't work psychologically with the flash backs--they were pretty, nothing more. Also, the Nazi material was pointless, because if you consider the twist, it all adds up to nothing. Also, there were so many scenes of just mindless dialogue and exposition.
There are theories that there are deeper meanings in the subtext of the nature of the employees at Shutter Island, that give complete new meaning to Teddy and his development--quite honestly, that's just digging. I don't blame Scorsese for this film, he did the best he could with the material. I'm pretty much in the realm of opinion with these guys.
http://www.youtube.com/watch?v=piSkIJwK6OM
However, the movie cost $80,000,000 to make, and the gross revenue is currently $130,825,000. So we just went from well-made schlock, to well-made profitable schlock. I can see some people liking this for what it is. For me, I really like psycholocial horror like Jacob's Ladder, Silence of the Lambs, or The Shining. Hell, even the Silent Hill video game series works (we won't talk about the movie, though ).
That's all, just my opinion, and according to Rotten Tomatoes, I'm in the minority anyway. It's on the top 250 list on iMDB also, but that's always changing. Wanted to like it more, just couldn't. Sun rise, sun set.
Cheers