We had a great stay at Silvia's apartment. It's very conveniently located, 10 min. walk to the Rialto bridge or Piazza St. Marc. There are restaurants and shops nearby if you're feeling exhausted after a full day walking through the city. It's comfortable, clean, safe and calm.
We were welcomed at the vaporetto (water bus) stop - which is really close - and guided to the apartment. Silvia has been very helpful, arranging our meeting point for the check-in, or storing our luggage the last day after the check-out.
Definitely a good experience in Venice, perfect for a couple.