Very nice cosy place that happens to be both quiet (located in a hidden inner courtyard) and in a central location (right next to Accademia waterbus station), which is close to Gallerie dell'Accademia, Ca'Rezzonico, and the Peggy Guggenheim collection. The place is clean; the host was very kind and met us at the waterbus station, leading us all the way to the front door and personally showing us around the place. Restaurant recommendations are fantastic, and there will be a guidebook that'll give you all you need. Excellent communication, smooth check-in and check-out.
One thing you should be careful about, though, is that the electricity system cannot take too much at once. I.e. if the heater is on, do not use the kettle or hair drier etc. or else the switch will snap and you must reset the power (which is very easy and quick to do, but still it would be nice to avoid it).