As near to the train station of Mestre as can be! You need around 20 minutes to the centre of Venice by train, a single ride ticket costs only 1,35€.
The room looks cozier than it is - we found it pretty dusty, and it's loud. The windows are very thin, you hear the nearby highway, the trains and everything from the street, even when the windows are closed. On the plus side: The heating works well, it gets warm fast, even when it's cold outside. The water cooker is fine as well, but has a lot of limescale in it - must be the water, because cleaning it didn't really help for long. Two days later it was calcified again.
Good for two or three days, but eight days were too long!