Hope for you it isn't a cut version. Check the running time if it isn't 1h30 (or something near this) I'm not sure it really worth your time.
I'm afraid to ask what you thought of Superman 4: The Quest for Peace.
The fourth one is better, Superman 3 isn't a Superman movie but a Richard Pryor movie. Of course Superman 4 isn't really good, and I'm very generous on this.