Good Location; Noisy Rooms
I stayed at the Hilton San Francisco Financial District for one night in June 2012, after purchasing my room on Hotwire. The room is slightly outside of what I would consider the financial district, but still close enough to walk anywhere you need to go. Although the hotel itself was smaller than I expected, it still had all the amenities necessary. The coffee bar downstairs was great in the morning. 
I only found two downsides while I was there. One, the room was very noisy. It sounded like there was construction going on in the room above me at 10 p.m. Thankfully, it quieted down around 10:45, but it was still an annoyance. Secondly, the Wi-Fi internet (which I've seen many people talk about here in TripAdvisor) is NOT free. It costs $9.95 per day, I believe. Just something to keep in mind.