Mine has worked well. I've modified a daisy-chain lead so I can use two or three power outputs to power an HX Stomp, just need to actually try it out. However, you can't get them now. There's a selection of allegedly isolated budget PSUs available with assorted different mixes of power output, mostly taking the form of half a dozen or so low current outputs (100mA or 300mA), one or two high current 9V outputs, a dedicated 12V and a dedicated 18V output.