I have hard water and have had problems with dishwasher detergents getting my dishes completely clean without spotting. When I decided to go all natural for my family's health and environmental reasons, I expected to have an even harder time finding something I liked, but Ecover tablets are amazing. Since using it in my Bosch dishwasher, I have been able to stop pre-rinsing. I avoided powders in the past because they never seemed to disolve completely, but Ecover never leaves any kind of residue. I air dry my dishes, and I get very little spotting now. This product works even better than conventional products. I also like the fact that it is fragance free, as some of the other brands left me with asthma-like symptoms. The price at Whole Foods is not much more than I was already paying. I will continue to buy, as I think it's the best product of its kind on the market.