Claudia's place is located a bit away from the noisy tourist centers. This is perfect for us as we like the quietness. St Marcos Square is only a 15 minute walk (assuming you know how to navigate Venice, which may take some getting used to). There are some nice restaurants nearby and a grocery nearby. We saw dancing at a nearby square during an evening.
A couple of things worth considering: we did not get confirmation on how to get in to the apartment until within 24 hours of check in time. This led to some anxiety to us as we were travelling in a foreign country. Responding timely to guests would be great. The other fact is there is only one ac system in the entire apartment. Bedrooms can get uncomfortably hot. During our stay we had to leave all the bedroom's doors open. Even then it was hot inside the bedrooms.