Hendrix was such a fantastic icon/musician, who definitely deserved the best presentation and unfortunately that wasn't/isn't always the case - far from! If you consider that there actually only was four original albums released during Hendrix' life, which all was amazing, all the rest vast number of releases was posthumous material. A little handful of those are fortunately great stuff, but a lot of it should never had seen the light of day.
Hendrix Plays Berkeley is fortunately very nicely recorded and highlights from the Berkeley concerts was released on the posthumous album "Hendrix in the West" - very nice live album.
Unfortunately the film is kind of an amateurish effort, but worst of all is the total insensitive editing where big parts is brutally cut out in the middle of his solos, which makes the film quite irritating to watch, specially when the very same performances is familiar to you, in their full length, on various albums.
They should be able, with the modern technology, to improve the film quality and make a way to avoid the cut outs of music, so it would be a presentable film - that said for a fan it is worth having, at least it is better than nothing and the song Johnny B. Goode is presented in its entirety.