Our stay at Enrico's place was good. It was easy to check in with Enrico's mother and took no time at all. The location is excellent for tourists, as it is near the train station and the duomo, among other sites. It is also directly across from the Florence Central Market, where we ate lunch and dinner (excellent and cheap!)
The apartment left some to be desired. We knew it was on the fourth floor of the building, so that was not an issue. It was a small apartment, especially the bathroom. There was barely enough room to use the toilet. Also, the entire bathroom and kitchen smelled like the restaurant from below, even with the windows shut. A little disconcerting.
The bedroom was nice, but got hot at night, even with the fan. The air conditioner unit cools the kitchen down, but does nothing for the bedroom. Just a tip for summer stays.
All in all, it was a nice place in an excellent location for a weekend getaway in Florence. I would not stay here in the summer months for longer than a weekend, because of the bedroom temperature and the smell of the bathroom and kitchen. I'm sure these things are not an issue in the colder months.