You expect comfort and practicality from a full-size Buick--a roomy cabin, a big trunk, even a certain level of refinement. You might not expect excellent road manners and good dynamic capabilities. Park Avenue delivers not only the traditional Buick virtues, but an enjoyable driving experience as well. Opt for the supercharged Park Avenue Ultra, and the experience becomes downright entertaining. This is one fine sedan. For 2001, Park Avenue and Ultra offer optional Ultrasonic Rear Parking Assist.