Haven't seen such an awful film for ages. It is so bad it almost has the potential to become a cult classic. You should watch it with a bunch of good friends and a lot of beer, and then you might just get through it.
I struggled to understand what historical period it was set in; the political references suggest 1940's, but Umbopa wears modern dress and Quatermain's school bill is of a modern order of magnitude. The effect was surreal. We were given very few clues as to the plot. There were so many loose ends or things unexplained. The unpreparedness of the Fearless Four as they embarked on their quest was laughable. Acting was either wooden or OTT.
It was as though a bunch of people met on safari in the bush with a camcorder and said, "hey, let's re-enact that old King Solomon's Mines movie" and didn't bother to plan or rehearse it much or edit the results.
Having said that, I thought the scenery (and Wittley Jourdan) was strikingly beautiful, and the cast clearly had a lot of fun making this movie!