We loved staying in Lucia and Andrea's place! We were a group of 7 -- 3 single women, and one couple with 2 teenage boys. The setup was perfect for us with 4 spacious bedrooms (the boys took the one with the loft) and 3 full baths. The place was very clean and tastefully decorated, with high ceilings making it feel even more spacious. The neighborhood was quiet and out of the more touristy parts of town, but close enough to walk to lots of shops and attractions, such as the Duomo and the Mercato Central -- 10 to 15 minutes. Lucia and Andrea were very gracious and responded to our questions and requests immediately. They even brought over clothes pins when I said I wanted to dry my clothes "Italian style." On the day we arrived, Andrea let us into the building and explained all the ins and outs of the apartment. And then he took us around the neighborhood to help make a reservation at Tito's down the block (which was excellent with lots of locals and a fun atmosphere), and to show us the nearby market, pharmacy, etc.
We especially appreciated the air conditioning in the apartment because the temperature hovered around 100 degrees F (38 C) every day that week. It was wonderful to come back and cool off there every afternoon!
All in all, it was a great stay and we would definitely stay at Lucia's place again the next time we're in Florence!