What a Marriott!
Having read previous reviews on this Marriott, I resigned myself to two nights in yet another overpriced hotel with worn furniture, slow wireless, and an overwhelming conference-cattle-call atmosphere. Nothing doing. Marriotts are famous for their good service even when the physical plant leaves a lot to be desired, but here you can have your cake and eat it too. 
Room is huge; tv works, a/c does not sound like a loading dock, and although it was inner room with no view (Rey, excellent front desk clerk, checked me in 4 hours early -- a lifesaver -- and I was not about to get picky), but it had excellent light and enough room to do push-ups, jumping jacks; you get the picture. Bathroom was big, good products; my only complaint was slow draining tub. 
The rooms are also well set up for doing work. Desk station has plenty of room for lap top, good lighting and good natural light too. 
Conference attendees, note: The Marriott bends over backwards to get things right. I was at a conference with several thousand attendees, but even with this overwhelming number the Marriott manages to streamline everything, from the FedEx office just off the conference rooms, for sending back materials, to the extra *$ cart set up in the bar in the morning for overflow caffeine addicts. Pool looked good, nice outdoor lounge area. Gym, medium sized, good machines, good towels/free fruit, etc. 
Best, Marriott service was incredible, from Rey at the front desk to the folks in the lobby who bent over backwards to accommodate guests. The Marriott really gets it: it anticipates guests' needs instead of reacting to them, when one's blood pressure is on the rise over "x" glitch. 
Finally, location is fabulous: across street from Yerba Buena Park, 2-3 blocks from four museums (MOMA, Cartoon Art, Jewish Museum, African). A million outdoor restaurants, Mel's Diner, etc.