Wow, was Paola's place perfect! It exceeded my expectations in all aspects. First, Paola was a great host, and gave us very specific directions, as well as being very quick to respond to all communication.
Location: Right near the Rialto Bridge, about a 5 minute walk. The Rialto market was a 2 minute walk, and such an experience! Because of the great amenities in the kitchen, we were able to cook an amazing seafood meal using market ingredients, and eat it on the quiet and romantic terrace outside. One of the seafood vendors explained exactly how to clean and cook baby octopus, and it turned out amazing! There's also a supermarket about 10 minutes away, where you can save a lot of money if you want to buy alcohol, snacks, etc. The Piazza San Marco is a 15 minute walk, and the Jewish District about 25.
Amenities: air conditioning was a life saver! I specifically wanted an apartment with air conditioning because of the bugs and heat at night, and I was able to sleep with the windows closed in comfort. WiFi worked well, once it was slow but I just had to unplug and re-plug the router and it worked just fine. Bathroom had everything you needed, as did the kitchen, including Italian coffee :-D Building was very safe, and it even had a hallway door which locked as well.
Overall, this apartment made our trip amazing, and I would definitely come back again!