Our family of 5 stayed at TJ's place for 13 nights. TJ is indeed a superhost. He communicated with us throughout the whole process. (Also, the bottle of wine and snacks were a nice touch!)
It's clear that a lot of thought has been put into making this a home away from home. Even thought it's an older house, it's been remodeled recently.
You can walk to nearby grocery stores, cafes, and restaurants. Great mountain biking can be found at a variety of spots all within a 15-minute drive of the house. Sea World took us all of 11 minutes. (Wednesday is a great day to go.)
Please note that the unit does not have AC. Coming from Arizona, we didn't realize this is common in San Diego. We only experienced two really warm afternoons in the house. (It was nice on the patio during these times.)
For those working from home, the (fully air-conditioned) library is a 5 minute walk and has all the amenities needed for a "home office".
All in all, the location is a great place for a homebase while exploring San Diego.