There isn't really anything I can add to all the great reviews already listed. Location, Location, Location. NorthPark is 15 minutes away from almost anything you would want to see or do in the city, of course except for La Jolla.
The Airbnb, is a tastefully constructed efficiency. Although it's small, it has most of what you might need for your stay. The Murphy bed folds up to become a table than folds down again to become a bed, which I found to be very comfortable. There is no separate desk, so you use the table for a computer station or a dinning table. I would rate the Airbnb 98% pedestrian friendly.