When I watched this as a youth back in 1980 or so, I really thought I must be the only one weird enough to not only like it but love it. Since then, I've seen it lots of times. Now the DVD has made it even better, with a very nice anamorphic transfer, and a very imaginative re-mastering of the sound into 5.1 surround. The whole job done on the DVD is first-rate, including snappy, subtle menus (none of that expensive, interminable Star Wars etc. tripe!).
The commentary is both informative and amusing. The director Michael Anderson gives a good performance, accompoanied by Michael York who is very suave and silly, as you would expect him to be. He actually says things like, "you know, in movies, they sometimes go from the studio set to outside, just like that!" which is very funny. Also featured is the costume designer whose name of course escapes me. He sometimes seems a little embarrassed, but really I think most people wouldn't have the costumes any other way.
If anyone is reading this who doesn't already know the movie, I'd be surprised. It's THAT kind. Any showing in a group will result in disaster, unless your friends are all of a very like mind.
This movie isn't out on DVD in the UK, forcing me to cheat because I can't wait for it. PAL, by the way, is a bit sharper than NTSC but flickers a little more, so take your pick.