Excellent hospitality
We've been for only 3 days. When we checked in at the lobby, they also found my notice about higher floor room possible and gave us on 19th. Good view on one part of the city. Important remark : on the card key was written : "walk in like you own the place" !!! And they really felt that way !!!
Great in accomodation and hospitality and they solved every possible question we might had. 
Just a block away from Union square and a bit further from PIER 39 (about $10-14 with taxi). Walgreens was just on the corner of the street.
Keep in mind that .....in summer months, San Fransisco is facing ......winter : no more than 50-55 F in the morning and barely 65-70 later on.So, be prepared.
The only disadvantage of the hotel, is that I didn't know beforehand the extra fees and taxes that are not included on the price (which were at about $24 per night). They had just made the reservation and not charged my credit card. They charged us on the day of checking out !!! There were several emails just the time before arriving with additional information also. Very helpful and descriptive.
I strongly recommend it !!!