I was greeted by Gabriela, who was able to accommodate my early arrival to Venice, which was much appreciated. Note that there is an extra tax required by the city (3 euros per day), and you'll have to show your identification.
The unit is a nice size for two, and very close to everything you'd want to see in Venice. From the train station, you can hop on the waterbus to the Rialto stop, and walk to the unit from there. There's also a very popular to-go pasta shop right next door in case you're in a rush and need some quick food.
One thing to note is that there might not be laundry detergent there, so ask about it or bring your own. I wasn't able to wash my clothes because I didn't have any. The hot water also might not be enough for two people -- it's good for about a 15 min shower.
Otherwise, location-wise you can't beat the place, and the hosts are very accommodating and quick to communicate.