Guido's apartment is a perfect place to stay for experiencing Florence. The apartment itself is simple but clean and comfortable. My husband and I did not use the kitchen but it's well appointed for cooking. The bathroom is spacious and comes with a tub (not always easy to find in Europe!). The studio room with the bed is very comfortable after a long day of sightseeing. As others have mentioned the street can be noisy, but you're in the middle of Florence and should expect no less! Guido provides a fan and having that on at night was enough to help us sleep comfortably. There is also a police station across the street which would help any nervous traveler feel safe!
Guido is very communicative and helpful. He checked in every day to make sure we had everything we needed and lives in the building so was able to immediately fix the shower head without complaint after my husband dropped it. I would rent from him again in a heartbeat.
If a comfortable apartment and great host weren't enough, from this location you are no more than ten minutes by foot to almost all of the major sights of Florence including Ponte Vecchio, Piazza della Signoria and Palazzo Vecchio, the Uffizi gallery, Duomo, and Academia.
Overall this apartment is the perfect place for a great Florence vacation.