We didn't get to meet Cinzia and Matteo but their place was cute, clean and comfortable. It's in a great, central location and we were able to walk everywhere we wanted to go in Florence. It's also just a short walk from the train station which was very convenient. Perfect size for a couple, the kitchen is very minimal so don't plan to do a lot of cooking - but there are plenty of great restaurants nearby so that wasn't an issue for us!
The downside to this place is the noisy building that it is in. We didn't hear much noise from the street but inside, our neighbors were talking in the halls, slamming doors and yelling all in the middle of the night and very early morning. It seems like it may be other Airbnbs in the building, so maybe we were just unlucky with the other guests at that time.