The new Malibu LS was a compromise between a new Toyota Avalon (price), Hundi Sonata (she didn't like the way the interior felt), and the Mercury Milan (wasn't available at end of year with options she wanted, and had OHC belt driven engine that didn't match the 'bu's highway gas mileage). The 'O6 'bu ran out very well when test driven, but developed irritating rattles after about 1000 miles, which the dealer fixed. At the first cold weather, the heater vent control motor started to howl, which again was replaced on warranty. Other than that, no major problems to complain about.
Sunroof, XM satellite radio
Put a bit more quality in up front to eliminate "aparrently engineered-in rattles". Have had the same issue with the last 5 GM vehicles owned.