I've seem the show (and the films), youtubed the comic impersonations, read the biography, seen a half dozen of various Trek/ Shatner documentaries. I've got his version of Lucy in the Sky (and Common People) on my iPod. I'm not extreme, but i guess I'm a fan.
Ditto for ballet -- I'm a fan, and I've seen enough to know what I like and (I think) have a reasonably informed opinion, for a non-dancer. Ive never seen Sappingtons work before, but i like modern ballet and she intrigues me. I think ballet struggles to be cool, and sometimes the whole "rock/sex it up to get young folks (ie, under 60s) in the doors" vibe can cross the line into desperately awkward. But this project seems to be on the genuine side of that line, so kudos there. I would have liked to hear a question on the (theoretical) commercial appeal, but this takes a pretty softball approach to the participants.
I was somewhat surprised to see a lot of Ben Folds and Henry Rollins in this, and obviously the album predates the show by a few years, but I guess they had the cameras rolling then, so why not use the footage? I've never been big fans of either, but I do like indie rockumentaries, so that offered another angle. Both musicians come off as solid craftsmen as well as artists. That may sound like faint praise, but f you've seen Some Kind of Monster, Wilco/Break Your Heart, Anvil or any of the other dysfunctional band docs, you'll know that I mean it as a real compliment.
Back to Shatner -- who is very much the star of this show: I've never quite been sure whether the guy is talented or lucky. I'd say that this film, more than any other, gives you an insight into that question. He defends his original music career (fairly convincingly, it must be said, though it doesn't really touch on the rock-it-man goofiness). He really talks up Has Been as a work of art, not a money grab, and I buy it. He has a lot of interesting things to say about a lot of topics, though, it must be said, i still wonder if he's the kind of guy who googles before he's on camera.
As a documentary, I think this offers great insight into how art is made (both the album and the ballet). I think both are worthy topics, and you get to see a large chunk (all?) of Sappington's work. Both are far more than kitsch (though I do wonder about the costume designer). I think the choreographing and staging of the ballet actually could have used a bit more depth, because it's interesting to see a ballet doc that's not over the top on the beauty and/or the suffering.
Anyway, if you tick 2 of the boxes: Shatner-phile, balletophile, indie-rock documentary watcher, I'd give it a pretty solid thumbs up for a "rental". I may be an audience of one, but I'm actually interested in Shatner, indie rock, and ballet, so this was a perfect little "rental".