Giovanna's house is very spacious and located in a great area - just next to a main street but at the same time in a small quite one. The house has 2 floors - on the first there is the kitchen and a bathroom and on the second - another bathroom, library area, bedroom with a big double bed and 2 bunk beds for kids. There's also a small very pleasant terrace on the second floor suitable for morning coffee or evening drink. The place shows some signs of usage but is clean and more than suitable for 2 people. The kitchen is fairly well equiped so you can prepare food there as well. The first floor is always in shade so it's cooler there which is very nice when you enter from the heat from the outside.
Venice is a small city so everything is in a walkable distance away. The main street right next to Giovanna's house will take to Rialto bridge and St. Mark's square (20min). If you need transportation, the house is just 15 min away from the bus station (Piazzale Roma), 10 min from Ferrovia station where you can take most of the vaporetto lines and just 1 min away from another vaporetto stop where you can take line 1. There are many restaurants in the area and a general store nearby.
The communication with Giovanna was very easy. We were welcomed by Paolo who showed us the house and gave us a few tips on Venice. We communicated with him through whatsapp and he answered all our questions.
Only downside to the house was the lack of mosquito nets, although this seems to be the case with most places in the city. While we stayed there it was cool enough so we didn't need to sleep with opened windows (there's also an air conditioning, though) but mosquitos do enter so take some repellent with you (you'll need it in Venice anyway).