The flat was in an amazing location, with a balcony view of Ponte Vecchio. You are literally a 5-10 minute walk from most sights and can easily cross the river to the Oltrarno, which I recommend for evening meals. Head over to Piazza Santo Spirito which is a good place to grab a meal. If you want to treat yourself, Trattoria Cammillo, which is nearby the piazza has great food. It's dear, but as a one-off treat you can't go wrong with the quality of food.
I also recommend checking out Piazzale Michelangelo, which is about a 15-20 min walk. You can catch bus 13 instead if you like, but the walk was not too bad as the weather was nice. We grabbed a gelato en route at Il Gelato di Filo, which was really good.
The flat itself was clean and had all the amenities we needed (coffee maker, microwave, kettle, etc).
And last, but not least, Marusca was a great host. She spent time listing great places to eat and visit in the city and was readily available when we had a question or needed something. I highly recommend staying at this property.