Geoff's place is very well located in the Mission district right between Mission and Valencia streets, which will give you not only easy access to public transportation but also a miriad of convenient pleaces nerby where to eat, drink, have a coffee, etc. All that while staying on a very quiet street.

The room is very confortable and has it's own bathroom and entrance from the street, which adds to your privacy. Key exchange during check-in/out is facilitated as there's a lock outside the street gate where you can pickup and leave the keys with a code Geoff will send you prior to your arrival. You simply get the key when you arrive and leave it back on the lock on you leave: simply like that.

Everything on the room worked fine (bathroom, shower, fridge, ventilator, etc.) and complied with the anouncement.

Geoff and his family where on vacations during almost my entire stay so I only met them briefly on my last day there but they're super nice and were very kind to me. Their kids are the most cute and kind also.

I didn't have any problem getting from there to places and back, even in the middle of a BART strike and the neighborhood seemed very attractive to a wide range of guests.

Only advice is that if you are tall, like 6'2" or more, the room's low clearance may be a bit uncomfortable, specially on the shower, but I didn't have any problem with that.

Overall, I had a very good experience staying on Geoff's room and it was a good cost/benefit booking which I would definitely consider for another stay in SF.