We stayed at Antonio's place for 5 nights with our 2 daughters of 6 and 2 years old at the begining of may and we've been pretty well there.
Located in the center, just as close as you can be from everything you want to see in Firenze.
The place is on the second floor (no elevator), kitchen and bathroom (shower) very clean and pretty new. Small and simple, very confortable.
We needed a baby crib and Antonio had a brand new one for us as we arrived!
Few things were missing but as soon as we told Antonio, he provided those within a few hours. The man is very kind and very concern about making our stay has perfect has it can be. Perfect!