The book "Algernon" by Daniel Keyes is one of the best and surprising science-fiction book I have ever read. The only one in any case that ever shed my tears. It's more about "anticipation", as we say in french, than sci-fi. Nothing to do with X-Files; even the antithesis of 4400 and other new age stuff far from reality. Much more basic, but much more realistic, nothing gore or chilling, no action. Pure emotion and reflexion. It's all about human intelligence, the suffering, the distress of being intelligent or not. This movie can not bring totally into life the Keyes' style, but it's a brilliant interpretation. The main actor (J. Boisselier) is impressive. I won't say much more.
Read the book, watch the movie (if there is an US translation) !
Read the book, watch the movie (if there is an US translation) !