This machine has its features and you are a kind brother to want to replace your sister's Kenmore, but if that is a WP-made Kenmore Ultra Wash, it is a more powerful cleaner than a KitchenAid. It might not hold as much, but it will get cruddy, crusty things cleaner than the KA. For average soil, you probably would not be able to tell the difference IF the KA gave two after rinses like the Kenmore, but did you notice all of that white stuff clogging the strainer and coating everything around the sump? That is left behind detergent. That is what you get with a purge and one after rinse. It means film on glasses and dishes and was probably one of the things that contributed to the failure of the vinyl on the upper rack rails. I had two KAs with that partial rinse syndrome and the only way to avoid that film was to be there with three quarts of hot water when it stopped filling for the after wash purge. I would quickly dump it in and restart it. The initial surge from the pump threw the water high enough to give things a brief rinse before the drain, but that is not automatic dishwashing, as beautiful as those electronic Superbas were.