Purchased my Roadmaster from my grandmother at 10 years old with 48k miles. Practically new and in great condition. 26k later, it has given practically trouble-free service, except for the fan clutch, power antenna, and spark plugs/wires. Coldest a/c I have ever owned (& never serviced in 12+ years). Gas mileage is great - I get about 20-21 mpg in mixed driving. Other than the size and the dowdy styling (which my wife literally hates), it's a great car.
Comfortable ride, gas mileage, room for 5.
Larger exterior mirrors, non-skirted rear wheel wells (like the Impala SS), more leg room in back seat.