We visited Florence in early july, and overall we were pleased with the choice of our accommodation. The location was perfect, we couldn't have ask better. Everything is reachable by foot within minutes.The flat itself is charming, very clean and quiet, and well organized.
Fernando is a very welcoming host. He had prepared every little detail, and has provided a lot of useful information, and even left us a refrigerator well stocked with fresh fruit, milk, cheese and bottles of water!
The only thing is that, in the middle of summer, it is really hot indeed. There's a fan, but that wasn't enough to somewhat cool the apartment.