I used this in my dishwasher tabs dishwasher and am more than satisfied with the result. However, the two chambers with Enthärtersalz and rinse aid are always filled. I find this product excellent and for our sewage treatment plant, it is anyway better than anyone else. Why these tabs were evaluated -Of Foundation Warentest- with deficient, is beyond me; but they will have their reasons to spread something. However, I must say for the price, you can buy the same tabs in other internet providers for half the price; I thought it was unfortunately out only now.