This place is FANTASTIC!!!! I can't imagine a better place to enjoy this amazing city. The location is perfect - close to everything and with a perfect view of the river, Ponte Vecchio and Uffizi. This was our first time using AirBnB and we were a little nervous, but everything worked out perfectly. Communication leading up to our arrival was frequent and friendly, and check-in was smooth. We bought fruit, yogurt, juice, water, etc. at the grocery store across the street and had breakfast each morning on the balcony. All the major sites are easily walkable. We especially enjoyed the energy and music from across the river, although it died down early enough to not keep us up at night. We found the bed to be very comfortable.
Here are a couple tips: don't leave the windows and outside door open - there are many mosquitos outside. We made that mistake on the first day and got eaten by mostquitos that night. By the second night, we had killed all of them and were fine. When you leave the apartment and walk down the steps, what out for the first step. It is pretty dark and the steps curve down, and I missed the first one once and almost twisted my ankle.
Overall, we couldn't be happier with this apartment. Although it costs about $100 more per night than we normally spend, this was the best $100 I have ever spent!