I just have to say the dishwasher. Mine is a Kitchenaid and all of those stories about cleaning off the grunge is TRUE.

It is so wonderful to be able to just hide those dirty dishes until you have a full load and then wash them.

I have never had a disposal - and I really don't miss it - and my kitchen sink has never stopped up.

My next favorite would have to be the washing machine. Nothing like going to the laundromat can wreck a lovely Saturday morning.