Okay-- let's face it, "Superman" is not the best, and certainly not the most consistent, franchise in movie history. The second film in the series, "Superman II", is a classic comic book movie-- superior in every way, shape, and form to the original. How rare is that??
This first Superduperman is too LONG!! It is also very short on STORY. All the stuff on Krypton with Superman's parents, the baby Superman's voyage to Earth, the teenage Superman-- all this stuff could have been told so much quicker. The early scenes with Clark Kent and Margot Kidder at the Daily Planet are cute, but beyond that, there isn't much going on in this movie. Lex Luthor wants to blow up the California coast, Superduperman has to stop it. And the ending?? Well, I don't want to spoil anything for people who haven't seen it, but suffice it to say that I don't believe anyone can literally turn back the clock.
As for the DVD, yes its a lavish package (the screen tests are particularly fun). But there are better movies that deserve this deluxe treatment far more. Richard Donner is a good director, but I bet he's had bowel movements more interesting than this overall bland film. Rent part II and save yourself the gas pains.