Great bit of kit, I love mine! Using it with an expression makes it ten times more useful, as it can be set up to control multiple parameters at once - e.g. increasing the gain on a distortion and lowering the output to compensate, changing the rate of chorus or phaser etc…
It also serves as a split - point for separate feeds to a DI and amp as it’s a stereo out!
Every home should have one.
I use a Line 6 M5 with an expression pedal for modulation, delay and pitch-shifty weirdness; everything else (filters, compressor, octave and many, many filth boxes) are honest-to goodness analogue units.