Well, even though you've already booked, I'd recommend Hotel Fontana if you don't mind stairs. I wasn't sure what to expect having not read a lot of reviews, but the place was great. Our bathroom was newly renovated (I actually think it is the one in one of their ads) and we had a great view of San Zaccaria church. It was quiet too, something I was concerned about as it overlooks a small square. The location is fantastic, just far enough away from BSM so as not to be too touristy, yet close enough so that if one forgets her Secret Itineraries tour receipt and discoverers it 10 min. before the tour starts, she can still make it back to the room to grab it, and get back to the palace in time, all at a full OJ Simpson like airport sprint of course! The breakfast was great too. They make the rolls on site before they open, and boy are they good!