i have and use the m-audio ep-1 i think its called, i admit i didn’t want it at first because its plastic, but it is actualy very sturdy! and its cheap and works with everything that i can find (definitely anything EHX, they actualy include it with sum of there larger models)
it has a pot on the side to adjust the range, and a switch on the bottom to turn it into a different type to work with other pedals.
i also use a couple of different personal made expression pedals.
i haven’t found much use for the expression on the other modes, just the wah setting really, it works well with it, but otherwise like i sed the phaser, vib, and trem, modes i dont realy use it for that.