Our first stop on a 3-week Italy trip with a 12 and 14 year old. Luca's place was clean and so well organized, it set the bar so high. The location is at the end of the fish, but we felt it was the best location. The vaporetto stop was 2 minutes away, grocery store and restaurants on Garibaldi 7 minutes, St Marks 10 minutes. We never met Luca, but his mother Marisa met us to show us around the place. There are 60+ stairs to get to the apartment, but they were not too bad. There is an elevator, but it really it a luggage elevator that can fit 1+ people. We only used it on our first and last day.
The pull out bed was very comfortable if you need beds for 3-4 people.
Make sure you explore the Arsenale neighborhood, there are tons of hidden gems right behind the apartment.