Easily one of the finest American action films of the '80s. However, this film has a lot more going for it than one may think. Firstly, the phenomenal chemistry between Gibson and Glover, which is helped by a great deal of improvisation friendly direction from the great Richard Donner. All while sporting, possibly, the best performance of Mel Gibson's career.
If, somehow, none of that interests you; Shane Black's script is a masterpiece, and the action is spectacular.