The quality of this car is a major step up from Chevy cars of the past. Other than being on my 3rd set of brakes, I've had no major mechanical problems. I wouldn't have one without leather, a sunroof, and a spoiler because they really improve the look. I wish the leather seats were a little more comfortable. I have back pain during long rides. The resale on American cars is still poor. I'm trading mine in soon and after 5 years it will bring 1/10 of it's original sticker price. I think this car has held it's value better than that because mechanically it's very sound.
The spoiler and sunroof really improve the appearance. The V-6 has plenty to offer.
Better brake design. More supportive bucket seats. It doesn't really matter now because a new model is out.