I have always enjoyed Superman II a lot, being my favourite Superman Movie of all times. However, as I grew old I realised that at some points it had its flaws points. This was suposed to be changed with the Richard Donner version. Unfortunately that did not happen.
The good thing is that now, thanks to this fanedit created by adigitalman you will have the opportunity to watch the best of the two movies as it was one unique and good film.