The location was perfect and the host was there early to help us with check-in (she'll ask for your expected arrival time a couple of days prior). She was very helpful and gave us a map of the city along with dining recommendations and must-see sites.
While we were there, the internet didn't work so if we needed to use it, we'd have to leave the apartment and into the town square, so be prepared for that unless it has been fixed by now. The apartment is quite small and there's no outside-viewing window, but it's very well-furnished and cutely decorated; also keep in mind the building itself is quite old (aka old plumbing).
Also, check-out is at 10:00 AM, and she will be there on the dot! Overall, a good stay for a good price. Can't beat the location, that's for sure. Duomo is about a 10 min. walk and the Uffizi is literally next door. There are plenty of restaurants around and a pastry shop just a couple of feet from the apartment building's entrance!