Nothing so far.
It handles well with adequate power and it is smooth and quite at highway speed,
Just wait you have not had the car long enough to find out the flaws. I had a 2002 Malibu LS and nothing, but problems with the brakes. Chev had a problem with brakes in the Malibu and grand am models. I have been told it is the ABS that is causing this concern. Premature brake wear of the front pads and warped rotors. Average time between problem occuring was 15000 kilometres to 20000 kilometres.
Best of luck with the car though.I got rid of mine and will never buy a Chev product again. Since manufacture would not stand behind their product and repair concern. They told me they were aware of problems with brake, but it was my problem.
I have three Malibu's 1997, 2002 and 2004. They have 48,000 80,000 and 140,00 km on them. I have never had the brake or other problems listed and get approx 20 mpg in city and 38 on the hwy. Perhaps the best cars I have ever owned.