Fabulous place! Lovely terrace, the best shower I had during my entire trip, and perfect location, especially for the Duomo and Accademia. A/C worked great (in May/June heat). Cute little kitchen has everything you need (not a microwave, though, but yes a large toaster-oven that worked nicely).
If you have limited mobility, this place has an elevator that actually does go down to the ground floor and all the way up to the apartment floor. Wide, flat entry from street. I think about 2 steps up are in the lobby and 2 from hallway to apt. But not steep and not narrow.
Clothes washer was also great to have. I would definitely stay here again!!!