The heater core blew at about 75,000 miles and antifreeze flowed through the firewall on the passenger side under the dashboard! I paid nearly $500.00 to get it replaced at Pep Boys, and for some reason after traveling approximately 1,500 miles--it blew again in Illinois and it cost another $600.00! Beyond that, I have replaced the battery and the paint's clear-coat started to peel away on the car's roof. Also the controls for the radio located on the steering wheel never worked.
I have always liked the sporty look of my Bonneville. It already looks like a "unique whip" straight off the assembly line. Also it has enough power to stomp many 2007 cars off the line at intersections. It's handling although not as good as my wife's '04 Grand Prix, but its close. The interior is quite comfortable and there are multiple seat adjustments to fine tune my comfort. Overall I'd say the good points outweigh the bad.
I love my '93 Bonneville SSE; it is the best car to own even for a new driver. It's safe and built like a tank, but it's not too good in the snow and rain.
I suggest it for new drivers; it will teach them to drive a big car.