The Blue Apartment that is in Florence is a premium apartment located in the heart of the city, practically right beside the Duomo.
Although not large, the apartment is ideal for a couple given the amenities that are available within it, just be sure if you are traveling with someone else that you are the first to shower! The water heater is very small and two short showers had it blasting cold water by the end of the second one.
There are a few stairs leading up to the apartment, but given that you’ll likely head down them in the morning and back up them at night they are not a large concern unless you have reduced mobility.
Overall I would be pleased to book this apartment again given its location as well as the overall style and feel of the place.