This was solid and very enjoyable. My lady and I are huge classic rock and blues aficionados, and we tend to especially enjoy biopics of great musicians, so when I found out this was out, it was a natural accompaniment with a big bottle of Chilean red wine for a date night indoors. Greatly talented yet ill-starred musicians that are quickly catapulted to superstardom only to die in hideous and tragic circumstances are particularly fascinating--and Janis Joplin certainly fits the bill.
I'm not sure I've seen any other of Amy Berg's works, but this was very well thought out and made. I haven't seen any other films about Janis, but in seeing this I can't see how any other could be any more definitive.
Now to see the recent ones on Chet Baker, Miles Davis and Jimi Hendrix...