This apartment is amazing. I highly recommend you to stay here.
The place is really close to the boat stop "guglie" maybe just about 2 min walk. So you can take the boat directly from the airport to here. And you also can take boat here to many place in Venice. It also close to the main train station maybe about 10 min walk. So you don't have to drag your luggages thru those bridges which will make you really want to die if you with a heavy luggage. There is a nice supermarkets called "despair" nearby which building was a theater originally.
The apartment is clean and comfortable just like your home. It is 100% like the photos on the Airbnb. Alessandro is a kind person. He prepared everything you need. He even helped me when we had a problem to contact the host of the apartment I booked in Florence. He also introduced us some nice local restaurants. His information made our journey perfectly.
I think it is a perfect choice for you.