I have to stick my opinion in here. I just got back from an Auto Show in Motion and I had the pleasure of driving both the Impala and the GXP. I was not impressed with the Impala, neither was my husband. The exterior is plain and so is the interior. As far as power, even though it is the same engine it felt like it didn't have as much horsepower. I'm sure many people will like the car. But, it felt like a cheaper car inside and out than the GXP.