Amazing location. Hard to beat. Don't hesitate. Book before someone else does.
Best Airbnb shower for historic Florence so far, I have been in several so I know what I am talking about (at least having proper water pressure). If you enjoy cooking, then there is nothing like cooking with the view of the Duomo right there.
Yes, lots of stairs (but hey, we all need to work out). Friday and Saturday nights can be very noisy as the alcohol infused youth enjoy themselves in the Duomo piazza till wee hours. In any case, why are you not out there with them anyway!?!?!