The flat is located in a nice area (not too far from the center) but apart from the noise of the city center, with lots of restaurants and accommodations nearby. The bus/train station is 20 minutes by walk and the center (St Marc's Place) is approximately 30 minutes by walk. There are several boats stops nearby (5-10 minutes walk) from the location.
The room is big and with a lot of furniture. The bathroom and toilets (in the same place) are shared (so if the two other rooms are occupied it may be a little bit busy). The building is also an old one, so not very well isolated.
I had a very nice stay but I will prefer to point out these points.
Another very good point is that the owner of the place is extremely reactive and sends recommendation to visit Venise.