T3 may be unnecessary, but it works.

Rating: 9/10 (6 July 2003)

This film avoids all the mistakes of the Matrix: Reloaded. It's brisk,
the action purposeful, humorous when it needs to be, smart and
well-written. There is also none of the Matrix oddness (e.g. when
John Connor makes a rousing speech, it isn't followed by the
Terminator doing some weird dance number). But what really swayed me over to the movie's side, was the
wonderfully downbeat ending. It took guts to do this and everyone
involved in the film's making should be applauded for their
courage. The late Gene Siskel said that one of the biggest
problems with contemporary American movies were the endings:
writers and directors no longer knew how to end them. This movie
ends right. Well done.