Lorenzo was a great host and we really felt welcome. He explained us all about the area and what to visit, which was very useful. The apt has an amazing location, it is less than 5 minutes walk to most of the touristy places in Florence (e.g., the Medici chapel is literally less than 1 minute walk). All in all, host was truly amazing and he was always there for us.
Regarding the place, it is nice and cozy, with an amazing location. However, the ceiling is really low (I was constantly banging my head; there was a lot of crouching) and it was not as tidy as in the photos. Also, there are no windows in the room, so it is always dark (or you need to keep the light on at all times). The host was trying to help as much as possible with all the other things, but the apt is built as it is, so there is not a lot one can do about this.