This is a kind of fake story of some of the singers who inspired and were part of glam rock. There's a central character who's obviously based on Bowie, another who's mostly Iggy Pop. Various others take elements of Lou Reed, Marc Bolan, and so on.
The music is a mixture of actual music from the time and specially-written tracks. The performers in the bands appearing on-stage and on the soundtrack are impressive: Thom Yorke and Johnny Greenwod, Thurston Moore, Bernard Buttler, Ron Asheton, and more.
But the story is thin, and overall it's kind of boring. Apart from the songs, the main interest for me was in looking for parallels to the real people. Which is not really enough to sustain a film.