Nothing is programmable inside those controllers, but this does not matter, as you can assign any buttons or knob to any function of vArranger, and vArranger will send led feedback to light the buttons accordingly to what is selected on screen
The buttons are big and with a click. I don't think they will last a lot of time
The light is very nice, blue, green, orange buttons...
The controller is a bit too big for me, but it is ok. I will put one on every side of the screen
The infinite knobs with led-rings are very good for vArranger, since vArranger will redefine their value and they will always be in sync with vArranger, even with VST parameters.
It is a bit sad that you need to turn the knob many time to be able to change from 0 to 127 value. So they are not useable. I will maybe create a special script for them in vArranger to accelerate them