I had a very beautiful trip thanks to Dave and his apt. It really is central in SF, and I could walk almost everywhere, and if not, BART , buses, trolleys are quite near. Hayes District where the apt is located is very nice to visit ( Haight and Hayes St).
The apt is in a basement, is well equipped, although I never cooked there. The washing and drying machines are outside the apt, in the building a few steps away. Dave gave me coins to use them.
On the whole, it is comfortable, but a bit noisy in the morning with the tenants leaving for work.
I do recommend this apt, Dave was very kind.