Bought this several months ago as a replacement for our Whirlpool dishwasher. We have country "hard" water with iron, so we chose the stainless steel tub as a necessity and cleaning power is comprised. This is our third dishwasher and the cleaning of the Bosch is fantastic! My husband has a stainless travel mug that is used daily. It was run through the old dishwasher several times weekly, but still had the coffee stain inside. BUT one time through the Bosch and the nasty coffee stain inside is gone, stains that were nearly six months old were gone! I love this machine!