The apartment is very well appointed and the four of us enjoyed our stay there very much.
The air conditioning was very nice to have in hot Venice and the view over the San Marco campanile from the living room as well as the roof terrace is a winner.
However the flat is better suited to a family with children, rather than four adults, as the second bedroom lacks windows (except for a skylight); furthermore, the ceiling is so low and slanted that one has to crawl to reach the foot of the bed. Also there is no storage at all.
Also, the description should say that there is a flight of stairs to be climbed from the elevator to the entrance to the flat. Some people may have problems with that.