Great host, great location and sweet little apartment. Family of 4 adults had no issues staying comfortably. Shower stall is tiny and you need to be careful with the shower curtain, else the whole bathroom will flood very quickly. If it does, no worries, Luigi got cleaning supplies and a mop in the tiny space next the bathroom door.
If you are coming from airport in a boat (Alilaguna), better get down at Ospedale rather than go to S. Zaccaria. It will save you some 40 minutes. Walk to the apartment is almost same from either stop,