I am driving one 2015 Impala 2LT, the V6. It says "F" on the key tag, but at the counter they told me it is "G" class...
Maybe they will keep this until the undercover cop model is gone.
The car itself is awesome, the engine is a blast, really fast for a 3500 lbs plus car, and the sound of it will just make you smile.
The interior is very good.
The electric steering is very good, the same tech from the Camaro, very pleasant in parking and at the highway.
The only things are the ugliest ever steering wheel I have ever seen, but that is just cosmetics.
This car would be perfect with a RWD though...
I'd say GM itself made this car a lot more Premium that the previous model, not just a new model but a different category.