I LOVE this car. Had one other and an Impala SS and Buick Roadmaster Wagon (same b-body platform). Detuned LT1 (0-60 in 8.5 secs) is easy on gas (18/20 city and 22/24 highway)and very reliable. Truthfully, the car will fall apart around the engine and transmission. Some designed-in ergonomic/interior fascia flaws but with bone yards ripe with these cars you've got plenty of cheap replacement parts at the ready. If you're looking for a reliable floaty boaty car, this it it. Tomorrow's collector car, for sure. But then again, how popular are 55 Cadillacs today?
Style - it's embarrassingly large and fun to drive. Super reliable. And not bad on gas (considering the size and V8 engine. Over-engineered V4P (tow package cars) have oil coolers, transmission coolers, larger radiator, and direct drive cooling fans making one super durable Caddy!
Poorly designed seat controls tear into the leather/vinyl. B-pillar headliner material wears off easily. Long car average length interior - would like to have seen more legroom for front and rear wheel passengers. The length is all in the hood and trunk. Detuned LT1. Sharp door edges.