The apartment is, in my opinion, slightly better in person than it looks in the photos. The bathrooms are new and updated, the air conditioning in each room works extremely well, and the location, right on a quiet canal, is terrific. Another bonus is that (unlike most places in Europe), the apartment has a tankless hot water heater, which means unlimited hot water.
As someone else mentioned, it's best if you can call the rental agency when you arrive in Venice. I didn't have a cell phone, so Fabio graciously arranged to have someone meet me at a predetermined time and place, and that worked out well.
Probably the only downside is that the apartment is located on the south side of the grand canal, so if you're looking to WALK to San Marco (St. Mark's square), you'll have to take the Accademy bridge; it's about a 25 minute walk. A much better alternative is to buy one of those 48 hour or 72 hour vaporetto passes; then you can take an unlimited number of vaporetto rides. Take the vaporetto No 1, SALUTE stop, to SAN MARCO stop, which is approximately a 2 minute ride. (I wish that I had known this in advance.) In addition, if you want to go out to eat, I recommend taking the vaporetto either to SAN MARCO or to, e.g., RIALTO; a five minute walk from either stop takes you to an enormous selection of restaurants.
If I were to stay in Venice again, I would absolutely stay at Fabio's place. With two full bathrooms, it's very comfortable for four people, very quiet, and the vaporettos make access to all the major cites very easy. I highly recommend the apartment.