This is a jazz performance as a theatre piece as a faux documentary as a drama, and like a jazz performance, the improvisations are always interesting, if not great. This is at its best when it's using that faux documentary structure as a stylistic tool, allowing characters to monologue directly to the camera and making the takes run unusually and realistically long through the use of hidden cuts and whip pans. Though clearly a chamber piece, the documentary shooting style and use of various perspectives and cameras enliven something that otherwise could've been fairly dull, making the most off-off-Broadway moments (I mean this in a not-great way), like the Sister Salvation section, at least interesting to watch.
Would be interesting to program this with the other movie that got banned by the New York censor board in 1961, Nude on the Moon.