Jack's place was just the ticket for our family vacation. We had 2 adults, 2 tweens and 2 seniors; it accommodated everyone perfectly. There's plenty of room for everyone to stretch out and relax. All the windows in the main living area and kitchen open wide to let in the breeze, which means you can take a break from the sun without giving up your fresh air and your beautiful view.
The patio is huge, as least as big as the indoor area and stretching across the entire width of the building. It's nicely landscaped and has more than enough furniture for everyone. The gas grill worked fine and was in good shape too. (I'm used to east coast beach houses where everything is covered in rust :) We spent a lot of time out there, people watching or reading or just sipping wine!
The location is ideal for South Mission: it's a couple blocks south of the Belmont Park area -- which is a mini amusement park and public beach access. Up there the beach gets somewhat crowded and there's a lot of activity if you want it; but at Jack's place the beach is relatively quiet and wide open.
We tended to venture out each day to explore and the location of the flat is very central to the San Diego area. Anywhere you want to go was really no more than 20 minutes in any direction by car.
Awesome trip and a great home base. I would definitely rent this place again. Cheers!