I stayed at Mike and Nic's apartment with my husband and our 2-year old daughter for 10 days, and just loved it. The apartment itself was cosy, clean, spacious with a very homey feel to it. We all felt right at home!
It was also the perfect base for exploring San Francisco, with easy access to the city centre whether you're using public transport (we didn't, but we noticed several busses very close by) or car. We had hired a car and had no problems finding a place to park it either. Though, if you do decide to rent a car, have the steep streets in the neighborhood in mind; don't rent a car in SF if you don't like parking and driving on such steep streets.
The neighborhood was just fine too, it felt nice and safe with locals walking dogs and jogging even in the evenings, and with several good restaurants and small supermarkets nearby too.
The only not so good thing I can think of was that we didn't get to meet Mike and Nic, as they were on a road trip during our entire stay. They kept in touch though and answered as soon as they were able to if we had any questions and we had no problem getting or handing back the key either.
I would definitely recommend this apartment, and would be happy to book it again, if we get the chance to come to SF again one day.