We stayed at Mark's place for 3 nights during our trip to SF. When we arrived, we had a little trouble finding the house because it was dark, and it was hard to find the house number. Luckily, we ran into Mark and he was able to help us get in. Mark's house was clean and comfortable. We were able to find street parking easily (but need to mind the signs to avoid getting a ticket). It is located in a quiet neighborhood and very easily accessible to everywhere we wanted to go.
We did wish we had a kitchen. When we booked this, we didn't think we would miss having one during our stay; however, with two little kids, we realized that it really would've been nice to have one. Mark did have a mini fridge, which was very helpful.
Also, the hairdryer provided did not work very well in the bathroom outlet, but it was just a minor issue for us.
All in all, we enjoyed our stay and meeting Mark, who was great host. He was flexible, SUPER helpful, and VERY quick to respond via the app.