Nico was great for wellcoming, he helped us as much as we needed. His mother was so nice, cheerful and helpful too, we didn't feel as strangers.
But be careful of shared bathroom! my wife almost killed me since she wasn't aware of it! :P
Evenings was cold outside but they didn't hesistate to fire up the heating system. Even one night my wife was cold in spite of the heating system because she was sick, they didn't hesitate one moment to give us the remote of the air conditioning in the room for additional heating.
The bathrom was very clean and brand new furnished. The breakfast was good, she even understood our eating habits and the next day she came up with the new ingredients instead of the ones we didn't consume! :)
The place of the house is very convenient; it's 5 mn walk to grand canal, 10 - 15 mn walk to Pnte dell'Accademia, 6-7 mn to Piazzale Roma. In Venice you walk everywhere anyway, except some main travels by vaporettos.
The fact that we couldn't use the kitchen didn't bother us much because we wouldn't cook anything anyway. But if you plan to do that, just keep it in mind.
And for the last thing, the apartment is on the last floor which makes it quite hard to climb; but it is good sport! :) Be carefull if you have some knee problems or else..