I love my Regal with two exceptions. Recently discovered that the $250.00 16" Chrome over Aluminum Wheels have corroded leading to separation between the Chrome and the Aluminum. This resulted in my new Michelin tires not sealing to the rim. In addition the headlight dimmer switch, buried in the stalk on the steering wheel failed. Discovered that there is no relay, so failure is expected. Most other cars in the world use a replaceable relay for high current use. Very bad design!
Otherwise I love my Buick! It routinely delivers 28+ mpg on cruise at 70+ mph. The supercharger is impressive too! The heated seats, dual zone, and sound system are favorites with my wife.
Do not use Chrome/Aluminum in high salt environments. Use a headlight relay switch. I'd pay the extra $0.50!