DO NOT STAY HERE!
I had stayed at this hotel in July 2012, I was travelling with one other person. Firstly this hotel is very low - it only goes up to level 4 so if you think you are going to get a view of the water FORGET ABOUT IT! Right upon checkin the staff we useless and very unfriendly. The person checking us in sent us to a shocking room that found us heading straight back downstairs to seek a better room for the price that we paid. Evidently once we complained there were better rooms available - funny thing that. Next we had to pay for daily internet which was fine however the internet supplied in this hotel is not done by the actual hotel it is a third party company and the internet is US$14.95 plus tax per 24 hours and it is EXTREMELY SLOW and keeps dropping out. The hotel does offer free wifi in the lobby but as you can imagine people fill the lobby and that internet is just as slow. 
That evening when we were getting ready for bed there was a strange noise in our door and someone walked into our room. Apparently the front desk had checked two different people into our room. We went back downstairs to complain to the front desk and they informed us that we were actually checked into another room on their computer even though the number on our key said the correct room which was the same room that the checkin lady told us and the room that our key worked in. How does this even happen?? What if we weren't in our room and the people who were given the same key went through out belongings? The front desk were most unhelpful but offered us breakfast in their breakfast area that fits TWELVE tables. That's right so you even have to join a waitlist to sit down and enjoy your breakfast. 
Next we went to talk to the concierge desk to get some advice on some things that we wanted to do in San Francisco as well as the best way to travel places. The lady was the worst communicator I have ever had the experience to talk to and have no idea how she got the job in the first place. She obviously could not be bothered helping us and handed us a map telling us where to go but not actually showing us on the map because apparently her fingernails were more important than us and was far more interested in them. I watched her on different occasions and it was not just me that she treated this way. I noted many other people walking away from her with the same bemused and shocked expressions. 
In terms of the room, it was adequate however the air conditioner is VERY loud and the lighting is terrible, our toilet also spontaneously made a lot of noise. And there was no fridge or in-room safe. Even better when you have strangers waltzing into your room. So much for top security. Do yourself a favour and stay somewhere else!! Near fishermans wharf is fine but if I went back I would stay somewhere near union square.