Most prior reviews are quite accurate. I was here for a convention at Moscone Center, and enjoyed walking the two blocks downhill to Market and catching the restored street cars.
I would add the caution others have that the parking garage is a few blocks away, and $35 for a full day; street parking during the day is 2hours, 8am -8pm if I recall correctly. I advise doing what I did, park your car in front of the house and off-load your luggage, then take it to the garage. I just left it at the garage for two days and used public transport and Lyft. Still a hugely great value vs a hotel of similar quality.
Ken makes great breakfasts and they are both convivial hosts. I slept extremely well and the view is wonderful. I will definitely try to stay here again if I have a similar need again.