I went from the regular DC Brick to this and its night and day. What can I say, but silent. Utility wise, it would be great is the knob to select between volts on 2 of the outputs was harder to rotate. It should click. I concerned that during transport the knobs will rotate and I have to remind myself to check the output voltage every time I set up. Other than that its great, but that's what keeps it from getting a 5th star.