The host was very welcoming, very helpful, he even surprised us with a bottle of wine.
The flat is close to the Firenze Rifredi train station, which was a priority for us, and not too far from the city center either (10-15 minutes by tram or a 45 minute walk).
The flat had all the basic things one might need but missed a few finishing touches: windows weren't clean, no place to place the soap / shower gel inside the shower cabin, had lights everywhere but many of them were quite dim, had mosquito nets but was still full of mosquitoes (not sure if the nets have holes or why exactly).