I love this movie. The original, and first movie of a pretty decent series of movies, is great to watch, and re-watch, time and time again. There is a great moment during the deposition/trial scene, where the 3 apes sitting behind the desk are basically doing the "see no evil, hear no evil, speak no evil"...and it lasts a bit. I just noticed this for the first time watching the movie today, for about my 15th time seeing it. Always something new to discover.
It's a great film, a classic one, to watch (yes the re-make is more current and has better effects), a good story of discrimination, experimentation, close-mindedness, religion dominating over scientific fact.