Dishwashers have come a long way since Illinois socialite Josephine Cochrane invented back in the 1880s what later became the KitchenAid. Still, they don't last forever. Removing an undercounter dishwasher and replacing it will take an experienced installer less than an hour. You probably won't manage the job that quickly, but it is a relatively simple procedure, especially because the plumbing and electrical hookups are already in place. And by doing the work yourself, you can save the $100 or more a retailer will charge, or step up to a model with more features. Dishwashers come in a variety of price ranges and styles (see Dishwasher Options), but all standard machines fit in a 24-in.-wide opening. So no matter which model you choose, you won't need to modify cabinets.