We had a great stay in Andrea's apartment! It is extremely close to St Mark's square and its possible to walk there in less than 5 minutes. Also extremely central to many other locations in Venice. The apartment has all the necessities and also has excellent wifi! Andrea is a great host and had many great suggestions for restaurants and other tips. Andrea was also kind enough to meet us at the St Marco boat dock, which saved us trying to find the apartment amongst all the small alleys.
Overall definitely recommended if wanting to be very central in Venice!