My 2009 Nissan Altima is the first four door car I've owned. I was hesitant to even buy a four door but for practicality it was almost a must in my life. After testing driving other cars in the Altima's class (Toyota Camry, Mazda 6 and Acura TL) I found the Altima to have the best performance (of a 4 cylinder) for the best price. I even told the salesman at the Toyota dealership who quoted me $5000 more on a Camry less equipped than the Altima I was considering that either the Camry is overpriced or the Altima is underpriced! Gas mileage on the Altima is great. I usually get 400 miles on one tank...