Some Good mostly Not
I stayed here for 8 days in March while I attended a conference. I stay at a lot of hotel in big cities. The good: It was only 3 blocks from the Hilton where my conference was and the Hilton was $50 more a night. This hotel had a good breakfast each day. Waffles, ham, turkey, cheese, breads, cereals, fruit yogurt. All included. The bed was very comfortable as were the pillows. The staff is very nice, organized and efficient. You get a shot of tequila at check in. The hotel is convenient to everything. Only a few blocks to Union Square. Got 7 days Muni Pass $27 and rode all buses and cable cars for free. Great deal. Rooms have a safe, Use it.
The bad. San Fran is very friendly to the homeless, drug addicted, etc. That is nice for them but it attracts them to SF. Some were very aggressive. I woke up one morning to watch someone shooting up outside my window below on the sidewalk. Their is a sign downstairs warning you of city noise. It is worse than most cities. I have stayed in Chicago and this was much worse. The hotel is on a path frequently taken by the local fire truck responding to emergencies. So sirens in the middle of every night. Our room faced a side street and was 2nd floor. Bad news. Their is a bar below where the smoker's hang out. Very loud talking until late at night. Screams, shouting, chase scenes , etc every night. The windows are useless in noise abatement. Possibly a better floor or not that side of the building. The room was advertised on the BW website as King Bed-Oversized Room. It was one of the smallest hotel rooms I have ever stayed in. Just enough room to walk around the bed. It did have a desk and refrig. But it wasn't even regular size let alone oversized. We had hoped for an upgrade as we are platinum level but no availability. 
We were warned by airport shuttle drive not to venture towards Tenderloin district and we went one block in error that way one day and it was thick with homeless and mentally ill people and drug addicts. Be sure your door closes and locks securely when you go out. I frequently found that a strong push on the door popped it open. The elevator is a real antique. 4 people at a time. This can slow down things as it was frequently full. Expect to use the stairs sometimes. Many people did. 
The hotel restaurant is very popular and well attended but 100% Vegan. Lots of other choices nearby. There is a free wine and cheese every night. 1st visit OK got there at the start. Second visit arrived with 30 minutes to go. People arrived to find no cheese, no crackers, sometimes no wine, no plates and or wine but no wine glasses. Not well stocked. So wine and cheese less the wine, glasses and cheese.