The 92 steps from front door of the building to the door of apartment, plus the internal spiral stone staircase to reach the 2nd bedroom and the top lounge area are totally worth it. Travel light (we didn't!) and be reasonably able. The panoramic views from windows all through the apartment, especially the top floor, are breath taking. If you climb the Duomo (highly recommended) take time to look carefully as you can spot the brown brick apartment building and the windows of the top lounge area. We felt like we were staying in a slice of Florence's 13th Century history. There is vibe and noise from the surrounding restaurants and bars until quite late, but for us, this added to the atmosphere!!
The apartment has been lovingly renovated and looked after, and very comfortable. The air conditioning in the heat wave was wonderful!
Thank you Edoardo E Michela!