Quite solid. has a good reliability reputation (and my experience bears that out)
Averaging 25.0 mpg in mixed driving, very good for the size of the vehicle and the the fact that it is a V6.
This is my 2nd Impala -- I have been extremely satisfied.
Excellent value for what you get.
Includes OnStar Safety & Security + Directions & Connections services. Download a destination from Mapquest, or just hit the blue OnStar button and give the address to a real person, and it downloads the route to the car.