Positives: The apartment was very well located - perfect for San Marco Square. The apartment itself was clean and had plenty of space. Wi-if was perfect. Matilde was really nice and helpful - she recommended restaurants, grocery stores, etc.
Negatives: We didn't like having to walk 3 full floors up (especially hard with luggage) and the AC didn't work very well. We waited over an hour for the host and that was hard in the heat with kids.
Overall, as long as you're ok with the 3rd floor and it's not too hot out because of the AC, I would definitely recommend. The location couldn't be beat!