Our stay at Jenny's place was unfortunate. Not only did the listing promise air conditioning which in reality did not exist (a claim that I am happy to see she has since taken down), the house was also poorly maintained. Screws were loose and falling out in the spiral staircase (I tightened them - you're welcome, Jenny), some drawers were coming off the hinges, there were spiderwebs and sand in the bathroom. Lack of air conditioning is not usually a big problem in Venice, however both bedroom windows face a wall and a back alley and there is little to no breeze that comes through. Mosquitos do, however, as there are no screens on the windows, so prepare to be eaten alive.
To be fair, the living room and (especially) the shared roof are quite nice, and so is having space in their garage as finding parking in Venice can be tricky.
Jenny was nice enough to let us leave early as we were quite miserable at her place due to the lack of air conditioning and cool air. But I don't believe we will be back.