Yep, have for about as long as rmonks. Nice unit, works fine the Gauntlet.
I'd agree with everything mentioned so far, not super heavy duty, but not junk either.
They are a little generous with the panel size though--18x18 is out to the edges, more like 17 square of heat.
Control is a PWM, not a thermostat--so you can't actually set the temperature, more like you set a percentage of the power.
Usually not powerful enough to run auto at full capacity.
I know some of the nicer ones have more juice going, but when we get heated up and cranking, we run 2-2.5 second flash times with this thing around 80%.
And they don't give me
good ink.