I have not tried this but I saw a demo video of it on youtube. Looks like it would work pretty well but it is pretty expensive. The only concern I would have would be the bottom part of the sluice becoming overburdened with black sand. But I have found that in some place even sluice boxes with large ripples can have this problem. But for the price that they want for this you could get an almost complete high banker (minus the pump probably) off of Ebay. I think that while it is a good design it is over priced, though I guess if you are in a rich gold bearing area and prospect regularly then it may pay for itself. I mostly use the Hex Pan gold pan after classifying. Good luck I hope this helps.