We stayed in Andrea’s flat for a month, and whilst both Andrea and his daughter, Vittoria, who we met at check-in and also had contact with during the stay were very nice, we experienced some issues.
The water pressure in the apartment was very bad, so taking a shower or doing the dishes took 3 times as long as usual - nothing that was mentioned at either check-in or in the apartment description.
The second issue was the internet - the WiFi was shared between this apartment and the tenant in the apartment below, that resulted in the WiFi becoming extremely slow and at times completely unusable (probably when the tenant in the apartment below was using it as well).
For a shorter stay I’m sure this is okay, and the apartment is in a really nice part of Firenze - but for a longer stay, at least to us, this became a bit irritating to live it.