We (party of 3: a couple and our niece) stayed in The Nest, and had a great time. Massimo has a great place, very neat and very convenient. It is in a great location, it was only 15 min walk to the Duomo. Having a place to park our car in a secure area was great (we only needed the car to hop between cities, it was not needed once we were in the city since we could walk to the downtown area).
Massimo was a wonderful host. He was waiting for us to greet us and show us the place. He prepared a very useful folder with maps and information, with pages we could take out and then return when we were done. Massimo also pointed us to places where we could take the bus, or have a nice breakfast down the block.
The apartment is just like in the pictures. It is in the top floor of the building, getting natural light. The kitchen opens to a nice outside area where one can have breakfast, and it also has a nice courtyard with plants where one can relax. We were very comfortable, and really enjoyed staying there. In a future stay in Florence, we would definitely stay at "The Nest" again!