We stayed two nights to explore Florence and found Federicos place to be a good starting point, as it is situated very central next to the cathedral. We found out, that the other riverside south of the city centre was more interesting for us and arrived in short walking distance (around 15 min) in a vivid area with nice bars as restaurants.
The check in was very easy and we had everything we need. Thank you!
For a longer stay or if you wanted to spend more time in side, the appartment, which is situated on the ground floor and has not many windows, would have been to dark for us, but for the two days it was completely fine.