This is a great spot and very close to all the things you want to see and do in San Diego. The beaches are within 15-20 minutes and Balboa Park/San Diego Zoo is right down the street.
Check-in was easy, the room is clean and has the basic necessities you need. Our flight was delayed so we got to SD much later than expected, but Noemi was very accomodating and made sure we'd get into the guest house easily.
The area itself is quiet. The walls are thin though, we could hear the second guest house that shares a wall with ours.
Overall it was a nice stay and perfect for what we needed!