Feature:
Knob to adjust minimum level is useful when you're using this to control a lowpass filter (wah effect) so that you don't completely kill the signal when the pedal's all the way up. That said, the knob is EXTREMELY TOUCHY and rarely stays in place once you set it.

Quality:
I've had mine for about two years. I rarely use it anymore because of its shortcomings in the quality department. The problems I've experienced are: (1) as listed above, the "minimum signal" knob is not stable and way too sensitive (2) the pedal itself is hooked into the mechanism by means of a flimsy piece of plastic. it comes unhooked all the time and the first time it happened i thought it had simply snapped. which it might, at any time, for all i know (3) the pedal does not have enough resistance so it winds up feeling very flimsy and toylike. it falls down all on its own quite often, as a result, which is obviously not good for performance situations. I would not recommend this product for a gigging performer. at home messing around it's good enough for the price, but i'd be tempted to spend the extra $10 for the moog pedal.

Value:
it's cheap, in every way.

Ease of Use:
Plug it in and it works. Kind of a no-brainer.

Overall:
I am currently thinking about getting a more expensive pedal to try to find one that's not such a plasticky toy.

Feature:
-2 mode polarisation -min volume

Quality:
it's made from plastic but it's hard to breake somethink

Sound:
BEST BUY, I have this pedal on Roland RD-700SX, it's great.

Ease of Use:
verry ease

Support:
I have no problem's yet

Quality:
made of plastic, but seems sturdy

Sound:
I just bought this pedal as an expression pedal for the organ function on my Roland RD700sx. I tested it, and I'll be returning it. I experimented with the volume and expression control settings on the Roland as well as the switch on the pedal. The best result that I got was only a small dynamic range that occurred at only in the middle 25% of the pedal travel - not very useful.