Annamaria' place is great! It's the perfect location to walk to everything in Florence. There's even a great little coffee shop a few doors down, and a huge bonus was that my all time favorite restaurant in Florence--La Giostra--is on the same street!
The apartment is clean and updated. The beds were comfortable. Loved the keyless entry using a keycard. I also liked that the flat was street level--no need to worry about carrying luggage up stairs. Tip--because this apartment is on the street level, you do hear street noise from people walking by and cars. Sleeping with earplugs solves that issue, though. It's also not a busy street, so it really wasn't a big deal--just remember to pack earplugs.
All and all it was a nice stay. It's a great value, too. There were 3 of us staying there, and we felt there was plenty of room. We would definitely stay there again.