Let's start by telling the positive points: this apartment is very well situated, in a quiet street, no cars, and plenty of small shops (bakery, grocery store, fruit and vegetables) all around. It is a nice apartment, with a lovely tiny verandah, great for a nice cup of tea in the late afternoon. The kitchen is well-equipped.
Michele is a great host, extremely kind, knowledgeable, and flexible. It was a great pleasure meeting him and he treated us as friends.
The negative point is that there is no hot water in the shower. However, as we were there in summer it was not a real setback. For those intending to visit Florence in autumn or winter, this is a point to consider.