I lived there for a while. Everything that AN says is correct. Few other negatives that I would add are

(1) Even the basic shopping like groceries can be too far. You have to drive. (But now they opened a small grocery store on Camino Santa Fe.)

(2) People drive really fast on calle Cristobal and Sorrento Valley rd. (small annoyance)

(3) Carefully choose your street. Some rented houses are full of partying college students.