We are a family of three (parents + teenage son) and stayed for 2 nights at Alberto's apartment in late March. We enjoyed our stay.
(1) Alberto is very responsive, from booking to check in/check out.
(2) The self-check-in process works very well, with entry codes and an easy-to-find apartment location. I personally like it a lot, so we don't need to wait for the host and the host does not need to wait for guests. We also appreciated the flexibility for being allowed to check in 30 minutes earlier, to drop our luggage while the cleaning lady finished cleaning.
(3) We LOVE the location. It's near the Rialto Bridge with good restaurants and cheaper but good eataries (e.g., pizza) on the street of Ruga Vecchia S. Giovanni. Very convenient. A side note is that the water bus (vaporetto) stop is on the south side of the canal and the apartment is located on the north side of the canal. Thus, guests will need to carry luggage to cross Rialto Bridge (Venice bridges are full of stairs) to reach the apartment. Most importantly, the apartment is super quiet. We had a very good sleep, because the apartment is located in an alley (but very safe).
(4) The apartment is very clean and the decor is very modern. It's bigger than I expected. We have plenty of room to move around; very comfortable. Bedroom, living room, and kitchen all are in a decent size, although the bathroom (in particular, the shower stall) is on the smaller side.
(5) The only issue we experienced is the water pressure and temperature in the shower. We have learned that, if someone is taking a shower, no one else should use water. For example, if someone else turns on the kitchen faucet, it will mess up the shower water temperature.
Overall, we enjoyed our stay at Alberto's place and highly recommend his place.