I rented this a few years ago from Netflix. I didn’t really like it much, but the music was the best part.
The movie is not a great film by any means. It’s too long, too loud, and too overblown. Very much like Mad Mad World in that regard. But if you like camp as much as I do, it’s very enjoyable. Love Donald Pleasance and David Keith is this one. I have it on DVD and play it every so often, usually when I know my wife will be out for a while.