Location, location, location. Cristina's apartment is in a wonderful position in the very heart of San Polo district. Just 2 minutes from I Frari and San Rocco and 5 minutes away from the Vaporetto and Traghetto. It's a comfortable 15 minute walk from train station but bear in mind the steps and bridges that you will have to cross if you have a lot of or heavy baggage. The other major attractions can all be reached in 15/20 minutes but take your time and wander a bit and make sure you stop for coffee/pastry/gelato.
There is a small supermarket 1 minute away and a host of restaurants and bars in the vicinity. Choose wisely as some are very touristy. Caffè dei Frari is very handy for all sorts and does a very good Aperol Spritz.
The apartment is smaller than it appears online but that could be to do with the fact we only had the one bedroom. It's very quiet as Calle dei Forno ends with a canal and there is very little passing footfall. There is no wardrobe or drawer space which could be a problem if you have a lot to unpack. There is some hanging available but it is limited.
The bed was very comfy and the apartment overall is clean and tidy. The shower, however, did show signs of mould in the tiles and ceiling. We ate out every night but the apartment was stocked with plenty of utensils if you prefer to eat in.