I tried a bunch of wah wahs (Morley, Vox, etc.) including the top Dunlop model and they were real noisy and didn't like my pedalboard at all in series. This is the original and the simplest & best one I ever had. Relatively quiet and my pedalboard just loves it. Good value and good product. I wish the off-on stomp switch was easier to activate. I find it difficut to turn it on and off. It isn't any different than the others I've tried, but you really have to step on it hard to click it most times. Maybe theres a way to adjust the switch pressure under the expression pedal. I guess they felt like most people will be turning it on and off while they are using it. Cheers Abz