I had a wonderful time at Massimo's place. The apartment is great, very stylish and it has everything you could possible ask for. The neighborhood is amazing: Clement Street is just a short walk away with plenty of great restaurants, bakeries and Asian take-aways. The Golden Gate Bridge and the Golden Gate Park are both very close and actually within easy walking distance, and downtown is just a short bus ride away.
Massismo was a great host and couldn't have been nicer; everything was very easy, the apartment was super clean and you have a lot of privacy.
Overall, I would absolutely recommend this apartment and it is the perfect place if you are in San Francisco.