If it's in your budget, you can do no better. This was, top to bottom, one of the most incredible Airbnb stays of my time on here. The location in San Marco. is. unbelievable: you are all but on the Rialto Bridge itself, and the farmacia, bank, vaporetto stop, and (obviously) tons of food is all within a stone's throw. Every room is comfortable and stylishly appointed, and there's tons of space. Chiara herself is kind, flexible, responsive, and her recommendations are unbeatable.
The double private rooftop terrace (?!) is both larger and higher up than almost any other one you can see from there; in my opinion, the listing undersells how astonishing it is to be able to see many of Venice's most famous monuments from a private deck at your own Airbnb. My Venetian friends gasped! We ended up spending a lot of time up there sipping prosecco and eating snacks from the market nearby.
Just book it, honestly. It's worth every penny. You'll never forget it!