What an irony! Don't label something so fast without letting it prove itself - that's exactly the message in this movie.
The movie impressed me from the start. Clever lines. Clever plot twists. A clever story idea (read up the trivia too!) and a cleverer execution of a thriller. In lesser hands, it would be made into another run-of-the-mill fast-paced actioner. But Andrew chooses to tell the story in a way it will provoke our thoughts. In one deleted scene (only in the DVD), it shows a series of great people (JFK, Einstein, Abraham Lincoln etc) with 'defects'. Just imagine, if a system like the one in the movie was adopted earlier, they would be classified as 'In-valids' and deemed 'underclass'.
'Gattaca' is a fine movie, with good performances, an interesting story, and a shocking ending. However, even with all of the movies thought provoking themes, something just wasn't working as it should. I found myself not as affected by the movies themes as I should have been, and odd character choices detracted from the movies overall quality.