It was a little confusing that the instructions stated that our room had the number 3, because the number 5 was written above the door. In fact, it is the number of the apartment, and the apartment is divided into several rooms, which have their own numerical designation.
I have to point out that there is a slight smell in the apartment and there is mold in the shower. The sockets in the room and in the bathroom are almost falling out of the wall, so they need to be fixed before they kill someone.
The location of the accomodation is very near (about 2 min) the bus stop (Corso del Popolo) of the bus 4L, with which you can get to Venice Santa Lucia station directly, and then take ACTV boat city transport (vaporetto) to the center (San Marco).