We had a great stay at Giacomo and Claudia's place! My husband, infant daughter, and sister-in-law had more than enough space. The furnishings are very nice, bathrooms updated, and the kitchen has everything you need. The courtyard is absolutely beautiful and a wonderful oasis in the middle of the busy city.
The neighborhood is great, a 20-min walk from the train station with bags, and easy to walk to St. Mark's square, plus easy access to public transit. There are plenty of bars and restaurants in walking distance that are not overly touristy. The apartment itself is situated far enough from the hustle and bustle that it stays quiet.
I would highly recommend for a family or group of friends --- I would love to return!