The apartment was great, as advertised! Very close to all major attractions. Well furnished and upgraded with modern fixtures, bath etc.

The apartment is on the second floor and does not have an elevator. The streets leading to the apartment flood during high tide with about 6 inches of water, be prepared with galoshes in case you are leaving the apartment after high tide in the morning or coming back after high tide in the evening ( around 10:00 PM local). We used a local tactic of buying garbage bags and putting them over our feet the second night (Euro 4 for 20 bags).. Store bought plastic coverings are Euro 12 a pair. The first night we were caught unawares and had to take off our shoes, roll up our trousers and wade bare foot through the water for a couple of hundred feet and then wash our feet in the apartment.
We had to wait 30 minutes at the boat dock as Lorenzo was not answering his phone (apparently it died) and finally we got through to Christian.
Overall a nice place, close to St Marks and well worth the money. Advance knowledge about the flooding at high tide, common in Venice, would have helped.