We visited Venice as a group of 4 adults (2 couples) for a 2 night stay. The apartment was exactly as described - very clean, large and spacious, and had a good location right up the street from the Santa Lucia station.
Giorgia, the host, was incredibly helpful, allowing us to check-in early (10:30am) and also providing us with all the information we needed about the apartment. She was also very responsive to emails before and during our stay - always responding very quickly when we did have questions.
We were a bit disappointed with the early check-out time (10am), though we let it go since we were able to check-in so early and we were able to atleast keep our luggage at the apartment until we left the city at 12:30.
Overall, would definitely recommend and would stay at the property again if we are back in Venice.