I can highly recommend Massimo and this apartment.
The reception was perfect, with help to carry our luggage and a thorough introduction of how things worked. Very clean apartment with all utilities (we only missed an oven or a toaster). We also got tips of what and what not to do in Venice.
The sound seems to travel very easy to the apartment underneath, so you should be light on your feet when walking in the living room. The neighbour politely asked us to be more quiet.
Since we had a late flight home and no one had booked the apartment the next day, we also got a late check-out.
Keep in mind that the apartment is at the 3rd floor and there is no elevator. I got a good sweat carrying or luggage up and down :-)
All in all this is a great choice for experiencing Venice and I highly recommend it!