My Altima has been a great car - very reliable. Pros: good gas mileage for size, comfortable ride, sporty feel. Cons: trunk design - opening is very small for such a large trunk, both front speakers have blown out even though I don't play loud music. Cost to replace each one at dealer is about $170. I replaced one but am doing without the other for now. Overall, though, I'm very pleased with my car and plan to drive it until it falls apart.
Engine size compared to similar cars, gas economy, comfortable.
Trunk design is bad - looks to have been fixed with new Altima.