I'm at SAN several times a year. My main issues are the fact that you have to upstairs for departures (a problem with heavy loads of luggage & the lack of elevators) or to get to any of the parking lots (doesn't make sense to go down to get luggage only to go back up to get to your car). Also the shuttle buses to the rental cars are a severe time- drain. The terminals are small enough that there should only be one pick-up point per terminal to speed things up (rather than 2 per terminal). Also for such a technologically advanced city like San Diego not having WiFi in the terminals is a major sin.