Peter was the best host so far my wife and I have experienced on Airbnb. He has been very forthcoming before, during and after our stay. Peter provided all the necessary information about the neighborhood (which is, by the way, awesome - some of the best cafes in San Diego are located in walking distance, e.g. Madison and Parkhouse Eatery). The place is very cozy and home-like. Peter has ensured everything (and beyond your expectations) is there (e.g. complementary drinks and fruit) and we felt very welcome. The guest house has its own entrance and you can spend time without meeting the host, although I suggest meeting him for a quick chat! He'll recommend places worth visiting depending on your goals of the stay.
We will definitely stay there next time we are in San Diego!