I have the Voodoo Labs Proctavia. Imo, it does the Band of Gypsys sound, particularly the solos on "Who Knows" credibly well, if you put it before a TS or other od.
I don't hear where else I can use this pedal on; it seems to be a one-trick pony. And although I love listening to Hendrix, I don't/can't play in his style. The comments/reviews on HC are correct: one has to learn to play this pedal, as it sounds good only with a strat's neck pup and only on certain areas of the fretboard. It also has to be positioned before any buffered pedals. Lastly it can't co-exist on the same power line as your other pedals - pinning is opposite to most other pedals e.g. Boss, od's, modulation, etc.
If you wanna do the BOG sound, yeah this will take you there. Be sure to bring along your own od and wah when you test this pedal at a store.
I hope that info helps. I haven't tried any other Octavia+fuzz pedals yet.