ALDI and Lidl are not the bottom. In Germany they outperform traditional super markes in many quality tests. The key is the lean store/logistics scheme to reduce costs, not to sell crappy products. This combination is almost unbeatable, especially when carried out in a responsible manner: Only the right locations, own the property, no man in the middle (think of all the US high yielding retail mall REITs), only selective use of advertisement.