Overall an excellent location with the beach, market, liquor store, tacos, pizza and more all just a few steps from the front door. Getting in and out of Mission Beach is easy and we had no trouble exploring San Diego from this location. Having a parking spot was a big plus, too.
The lack of A/C, though well advertised, did end up being a frustration for our family specifically because there are very few windows in the unit – only patio doors. It was 84° inside the condo when we arrived so we slept with the bedroom patio doors wide open every night. It's a fairly busy area, so we weren't entirely comfortable sleeping like this for safety reasons (even though the area overall seems very safe). Lots of fans are provided, but it is a challenge to get the air circulating if you aren't at home with all the doors open.
All that said, Fran was a great host and easy to reach. If a beach location with a ton of convenience is your #1 priority, you'll be happy.