I got this pedal to control the pitch on an Electro Harmonix Pitch Fork and it works great as a bypass when fully backed off, has 100% effect when fully pressed down and its heaps of fun everywhere in between.
This combination is also great if you want a slightly smaller pitch shifting option than a Digitech Whammy Pedal.
My only warning: Do not forget to purchase a TRS patch cable if you want to use this as an expression pedal. Regular patch cables will not work.
If you do forget to buy one though, two 1/4 inch jack adaptors and a male-to-male auxiliary cable will also work fine!