The apartment is very conveniently located and has everything you will need while in Venice. The hosts communicated well before arrival and we had no problems at all except that the directions as provided were not entirely clear but as travelling goes that is not the end of the world :)
If you are travelling with only two people this room is perfect but any more than that may feel very cozy.
The only downside is if you are a light sleeper bring ear plugs. The gondolas go by all day and when the boat hits the wall it is very loud.
I think all of the buildings and apartments in Venice are a little damp and maybe moody so that is something you have to be ready for.
My favourite part was watching the gondolas go by, hearing both the opera singers and the gondola singers and the music bounce off the walls of the buildings made our stay feel very special.