We had a wonderful stay at Marta's apartment at the lido .we stayed a week with another couple.the apartment was light , airy and very quiet. We were there in the film festival and were concerned about noise from the airport but it seemed to be almost never used.
The lido was a great place to stay with plenty of good bars and restaurants nearby. It is about a20 to 25 minute flat and pretty walk along the waterfront path to Gran Viale and main vaporetto stop, but the bus comes very regularly every 15 mins or so.the vaporetto trip to entice is short and beautiful and you never have to wait long even at night.
When you arrive it is avoid idea before you go to apartment to buy a pass for bus and ferry to cover your stay as you will use it a lot and it is much cheaper.