Ran good for about 2 years from purchase, however, since then has been nothing but trouble. Catalytic converter had to be replaced, transmission failed also, brakes have had to be replaced twice and tie rod mount bracket broke (according to mechanic, he's never seen that in 20 years of work). I'll never buy another Buick again.
Powered controls, radio controls on steering wheel, dual heat/ac function.
Everything to do with realiability of vehicle, specifically the transmission, catalytic converter, brakes and suspension.