A very nice hostess who provided detailed tips about the city. The house itself is almost perfect too, considering the location, the size, the indoor decoration, and the price.
The only point that might cause a problem is the soundproof ability of the building. For example, slight noise like footsteps can be heard clearly by the neighbor in the lower stair. We knew that we should keep quite at night so we were just talking at a normal volume, no music, no dancing. And all of a sudden, a neighbor came slamming the doorbell and the door for quite a while, shouting at us.
I would say that the trip would have been more pleasant if we were informed how the soundproof ability was.