I cannot praise them enough, we had 3 great nights there in December 2011! 3rd and 4th floor of an old Patrician house, huge room, seems newly renovated, looks just like on the website. The first night we were the only guests, it was mid December and off season, they only have about 10 rooms. In spite of this there was a full, big breakfast buffet the next morning! There is a small terrace next to the breakfast room, where one can see the Campanile at St. Mark's from. It's a 3 minute walk to St. Mark's square, superb location. The rooms on the 3rd floor, which they call Locanda Antica I, have ensuites, on the 4th floor, Locanda Antica II, bathrooms are in the hallway, but they are fabulous, all gold and white. Staff very friendly, and as we were in the off season we had an ensuite, huge room, for less than half the normal price!
A bit difficult to find, you only see it when you are in front of the door, so night arrivals might have problems. I am originally from Europe, so I am used to old houses, but other people might be put off by the entrance to the staircase - bare bricks on the walls, nothing else. Well, after all, the house is 100s of years old, I took it as part of the charm. Up 3 flights of stairs, the two lower floors are solicitors' offices.
So, I would definitely stay there again, at least in the off season. I cannot comment on overbooking problems other people seem to have had, obviously.
