Check in was very smooth and easy. Paolo picked us up at the ferry and brought us to the apartment. Everything was clean and comfortable. Even the kitchen was well equipped. The place of the apartment is very quiet, as it is located on the island Giudecca. The view of the roof top is wonderful.
Unfortunately you have to take the ferry every time you visit Venice City, which is quite expensive (7,50€/ride) and we weren't aware of.
Anyway, we had a great vacation and can recommend Mario's place.