This pedal is top notch, from design to functionality. It's a bit bigger than I had originally imagined it, but not so big that it won't fit on your favorite pedal board.
As for sound, it doesn't get much better. The fuzz on this pedal is absolutely stunning and adds a nice bite to anything you play. The "octave-up," which is why you would actually buy this pedal, adds an incredible shimmer with or without the fuzz. It's a great way to really beef up your tone.
The ONLY downfall of this pedal is that it doesn't have an A/C input - which I think is an element of the 'faithful reproduction of Jimi's original Octavios.' Other than that, I couldn't be happier.
I've used it at three gigs thus far, and it seems to hold up even under the occasional heavy foot.