Maytag 300
Had that machine. Nothing but trouble. Didn't clean well because the flimsy lower wash arm would get caught on the rusting lower rack, and hence didn't turn. Not to mention the control panel kept going out. The handle latch broke, recalled for fire hazard. Racks rusted through after 18 months. It would clean well if you babysat it and freed the wash arm when it got stuck several times a cycle.
I too bought a Kitchenaid and replaced the Maytag 300 "quiet" series. Love the Kitchenaid, very well built, quiet, efficient, and cleans everytime. It's also the top rated dishwasher. Only one dislike, and I understand the premise. . . the silverware basket. You have to load each piece individually in it's own little hole. This does keep the silverware from nesting, but it's a inconvenience. A minor one, but inconvenient.