As someone who grew up watching SUPERFRIENDS, I can assure you it wasn't very good most of the time. That doesn't mean it couldn't be entertaining. But one part that was always good and entertaining was the opening of the show. It was uniformly epic, usually thanks to the stirring music and narration.
Some thoughtful soul has strung together all the openings for all the incarnations of SUPERFRIENDS in one handy video. They even threw in the unrelated late 1980s SUPERMAN series. It's a collection of animated justice so stirring, you may find yourself compelled to don a pair of tights and go out to fight crime yourself.
...OK, maybe not. But watch anyway.