My group rented an Impala while down in Miami. Had about 14,xxx on the odo. Idle seemed to be a tich high, and when you would apply throttle, the engine would bog down from the idle point with a grumble. It just didn't feel "right". Maybe it just needed some injector cleaner run through it.
Ride was smooth, steering was "grandpa car light", engine had good oomph for a v6. Interior trim level was middle of the road. Fake wood accents across the dash with nice looking black pleather. Seats were cloth. Back seat was big enough, and the trunk was massive. It felt very close to my old 02 Taurus.