If you are familiar with the movie landscape of the time this plays in (70s) or generally have a bit more background than I did, you may find many more interesting things in this than the general viewing audience. There is a lot of nudity in this (it is about soft-core erotic movie and it's stars after all), but the main thing this relies on, is the drama behind the scenes.
Of course it cannot avoid having your typical cliché in it, but it's still working overall, even though it's also all over the place (again maybe with a bit of background knowledge some things may seem logical). But you cannot deny this movie is trying really hard to tell multiple stories and many facets of things that probably went on backstage back then