We had a great time at Rina & Michael's place. The check-in and check out were smooth even if we didn't meet them. The place is clean and comfy and there is space enough for 4 adults. The kitchen is well equipped if you want to cook and the view on the hills is nice. It is not the most convenient place to visit downtown (count 20 minutes to reach a Bart station) but it's not that far and the ride with Uber or Lyft is fast and not too expensive. The neighborhood looked safe to us.
We would stay there again if we would come back to SF.