We stayed at Federicos place for 3 nights and our experience was below average. It wasn't something that Federico did or didn't do - he was a gracious host who responded quickly to questions and provided all that was necessary. However, it was the place that has some major flaws - it did not have any noise reduction windows and a weird echo effect that accentuated all the street sound when you are trying to sleep. See pros and cons -
Pros
1. Easy checkin
2. Extremely clean and modern apartment - with clean linens and towels
3. 5 mins walk to most tourist attractions
4. Decent air conditioning
Cons
1. Noise and lots of it. Either carry noise cancelling headphones that are easy to sleep with or join the college crowd. There is a hangout spot for drunk college students arguing and fighting right around the block.
2. Mosquitoes. This is a problem in the city of florence but I woke up with bites all over my body. The place could have been sprayed with bug spray in advance of our stay. Or a net around the bed will resolve this issue.
Bottom line - if you are going to be up all night then you wouldn't mind staying here. But if you are looking to get to a quiet, comfortable spot after a long day of touring or sight seeing, then look for a place that has proper sound and mosquito insulation - there are several better options around the area for a cheaper price. I hope Federico will address these issues, which will then make his place perfect for florence.