Haven't tried, but it sounds interesting.Its basicly a mix between a dutch bucket and a sip: the wick serves both as a safety aspect if top feeding pumps fail and the wick being in contact with the water in the res below helps with removing excess water from the medium by lowering the perched watertable.
I think I'm going to try hooking some sip containers together, and have one res. out of the tent to supply them.
I've already ordered what I need, matter of time to get it rigged.