Underrated - deserves 7+
Usually IMDB is reliable but this is one of those cases where the rating system falls short IMO.
Sure it was kind of a rambling narrative with no easy answers but the backstory of psychic experimentation by the U.S. military is a fascinating real life history. Plus you have George Clooney, Kevin Spacey and Jeff Bridges in the same film.
Also the final scene without giving it away was awesome. A good ending really makes or breaks a film IMO.
This really deserves a 7.0 of higher, not a lowly 6.2.