We had a great time at Federico's place and everything worked out as described. The flat is in an even better location than expected. The view over Florence is great! The stairs could be tough to climb for someone who is not used to that (especially in the heat) but there is a small elevator that takes you to the top. It would be hard to fit a larger baby carriage inside and I wouldn't want to carry it up and down. We had a stroller and that was no problem at all. We were greeted by Federico's father who gave us a warm welcome and was very friendly. Later during our stay when we had a small problem to get the AC to work (it was full since we stayed there during a heatwave) we got help immediately even though it was late in the evening. We really appreciated that! All in all we hade a great stay in Florence and we can certainly recommend anyone to stay with Federico.