We were a party of 13 in San Diego for a family reunion. 6 of us ( 4 adults and two teenage boys) stayed at this home, and 7 of us at a nearby home. Although I did not personally stay at this home, I spent quite a bit of time there, I have feedback from my family, and I interacted with the owner numerous times.
The house is actually two separate apartments, which worked out beautifully for us, as the two couples stayed in the downstairs suite (two bedrooms, each with ensuite) and the two boys had their own "bachelor pad" upstairs (two bedrooms and a shared bathroom). This gave the boys (and their parents!) some privacy and space which was much appreciated by all. The two units together is really an ideal set-up for a family with teenagers.
The units are set back from the street, which means it's quiet and feels quite private and peaceful. There is a lovely courtyard which well accommodated the whole party of 13 for outside dinners. The units were immaculately cleaned, beautifully decorated with 1920s styling , spacious and comfortable. The beds and bathrooms were very comfortable. The kitchen in the downstairs unit got the bulk of the use, and my family found it well-equipped and functional, even when we were cooking dinners for 13!
The location is terrific. You're walking distance from groceries, restaurants, funky shops, and Balboa Park, as well as being quite convenient to the airport. It's a really nice, comfortable and safe neighborhood.
Don is an exceptional host. He was welcoming, and always available (and didn't seem to mind all our little questions!) Our damage deposit was promptly refunded. 
My family and I would definitely stay again. Thanks Don!!