If you catch a chance to stay in this house, you must not miss the chance.
Nice street for food and drunking are just 2 blocks away and everyday you can go to alamo square by 5 min on foot. Very safe place and 5 min on foot away from the city tour bus stop. His house has very clean bedroom and bathroom as well as free coffee, nuts, cookies and fast wifi.
You will never get a chance to sleep such a nice place with reasonable price in SF.