Diana's place is perfect for a couple staying a week in Venice. The location is amazing. You will be in the center of the city and within walking distance to most places you will want to visit. Another positive point re location is hat the apartment is 10min away from a place you can leave your luggage if you still want to visit the city after you check out.
Diana is of great help to explain the key things you need to know about Venice, what to do, see and where to eat. She will give you great tips and is very reactive in communications. I would gladly return to her place if I go back to Venice.