I lived in Tierrasanta while I was growing up. My parents still live there.
That area is a fire concern, I know at least one of those condo buildings burned in the Witch Creek fire (and they all had to be evacuated due to it being close to open space). I would make sure the HOA has appropriate insurance and reserves.
As for foundations, the houses my family has owned (which has been two, one in the older part and one that was built at about the same time the condos you are looking at were built) have never had any problems. And I haven’t heard of foundation problems from neighbors. But I would believe the realtors regarding that, although you might want to ask for more detailed information.
As for shopping, there is a Vons and Albertsons in Tierrasanta, plenty of gas stations and random other stores in the strip malls. So you can obviously get grocceries nearby and gas to get where you want to go. And there are some restaurants, churches and parks in the area. Everything else you have to drive somewhere else (like movies, bowling, clothing stores, etc.). So in that respect it is somewhat boring and/or always a drive to get where you are going.
