This puts you right in the heart of Mission Beach...one block and you're at the beach (excellent and not crowded lengthy stretches of sand either direction, the obligatory bikes and scooters to pickup and go everywhere_), a block the other way you are at the bay, and there's lots of restaurants, coffee shops etc within walking distance. The place is small but clean, surprisingly quiet given there's a walkway right outside and you're connected through walls to other places, with a strong ac unit, gas stove, and has a charming view when you sit on the couch across to a little garden patio on the other side with sun pouring in. The hosts were great, and even brought round jugs of bottled water when the water suddenly turned off in the whole neighborhood for a brief stint. It was very enjoyable to lounge around, read, and wander to the beach on occasion, but San Diego has lots to offer and we were generally out and about.
The negative is parking -- we never found anywhere to park on mission blvd when we were there, so parked the entire time in this big (free) area off el carmel, but that's a five minute walk from the apartment, which given it rained at times was less than ideal.