Its a splendid movie all round. For me, it is indeed one of the finest work of cinema art. It tickles your curiosity throughout and doesn't falter at the end. In a nutshell, if you don't find this movie as being a masterpiece, you're either stupid or dead inside, there is no other way to put it.
"How happy is the blameless vestal's lot! The world forgetting, by the world forgot. Eternal sunshine of the spotless mind! Each pray'r accepted, and each wish resign'd"