This is a great film. I came to it, surprised but delighted, from having seen the first couple of Superman films. I have only ever seen TV cuts of the film, never an official video release, but since it's one of my absolute favourites, I had to write in. When it comes out on DVD, and I sorely hope it will, I will not hesitate to buy it (in fact, that's why I came here on Amazon to see if it was out on DVD).
If I'm to be brutally honest: Peter O'Toole's acting is a little too Shakespearean in this film and some of the special effects are a little rough... but all in all, there's plenty of good in it and it is a delight to watch. The plot is reasonable and doesn't get too tedious, and Halen Slater and Faye Dunaway give great perfomances as meek Linda / confident Supergirl and spellcasting megalomaniac Selena respectively. Some good comedy moments in it too. True fans of Superman and Supergirl will not be disappointed.
The only other downside is that it is fairly obvious that it has not had quite the same polish put on it as the Superman films. But if they made a sequel or two, I'd be right there to buy them.
(For the record, Amazon reviewer, the film DOES state (as Selena leaves the picnic area, it's on the car radio) that Superman has embarked on a mission to another galaxy in this timeframe {:v) )