Alex is a very gracious and easygoing host, his daughter is well behaved as well! He knows the city very well so if you want to get tips for places to explore, he knows them. The room is spacious and has ample free-space for storing bags, etc. The closet is a nice touch too. Do note you do have to go down a flight of stairs to reach the room if you have a hard time with stairs.
If you drive: Parking in the area is relatively easy, just note on his side of the street from 12-2 on Tuesdays you had to move your car. No big hardship. No other parking restrictions other than those enforced by the city, no "permit" required.
If you take MUNI: The 43 Masonic "outbound" will get you within 2 blocks of the house and it is a pretty easy walk up, there are hills. You also have the 8 Bayshore a little farther of a walk and you can easily reach the 14 Mission and ride along to Balboa Park BART.
Within a few blocks walk is a laundromat, corner grocery store, Walgreens, Popeyes, gas stations and transit options. A short ride on transit gets you to a Grocery Outlet, Dollar Tree, and a few other stores as well. The neighborhood is very quiet and safe, even late at night when coming home on the bus.