I'm using this with the GLM controller to control the monitors, it works well, though there's a slight lag between turning it and the volume reacting, it does not mean anything to me.
I am unimpressed with the thin wire and 3.5mm TRS jack, I'm afraid the wire or jack (in the GLM box) will break in time. On the positive note, it's just a 10K log potmeter, so it should be easy to fix.
The knob is heavy and won't slide around the table.
It has hard-stops at each ends of the scale, I hope these stops are made in iron and not just the potmeter reaching its ends.
It would have been nice if there was a way to adjust the hard-stop to something less than max volume to avoid accidents.