I got one of these on Ebay a few years ago to play around with. Mine was used and it turned out the 9vDC power connector on the pedal didnt work so I used an adapter to convert the 9v plug to a connector I could run to my voodoo labs power supply.
The sounds this pedal can create are pretty impressive but definately a limited usage. I also found in some cases the output was so much louder than the input I had to drop my bass volume down to avoid blowing people away when I engaged this pedal.
A fun toy. Ended up taking it off my pedal board pretty quickly.
Pros - tough un breakable it and the coach roaches will be around after a nuclear bombing
Cons - limited use
I use this mainly during when I am attempting to slap and on some funk cover songs. Its good on some older RHCP songs although I am sure its not the same pedal Flea uses but I dont have the money or resources Flea has so its good for that type of stuff.
Like the other person said its tough and will outlast anything you have ever owned and its better operated without the battery and on a board that can control the power that it will consume.
I do find that it takes a bit of the bottom away but it is an envelope filter and basically like a flanger but with less control. I play an Ernie HH Stingray and mostly keep it at 10 am and never use the distortion switch. And I also notice that it increases the volume so often times I have to adjust my volume dial back a bit when I stomp it on.
Otherwise its a beast and does exactly what is says. No frills, no extra stuff. just ball ball ball ball ball base ball