Great acceleration and gas mileage. Perhaps most importantly nowadays, it gets MUCH better gas mileage than it's competitors. The horsepower looks slightly lower than some other V-6 cars in its class but most other cars list their hp at really high rpm's (i.e. 6000+). The Malibu's 3.5 liter v-6 has a LOT more torque (which is what matters) than the engine's of its competitors. I literally get 38mpg on interstate trips with mostly flat driving when I drive conservatively.
Powerful yet fuel efficient v-6
Make the cloth interior look better for those of us who don't want to spend thousands of dollars on leather.