What a fabulous location. It is about 4 or 5 blocks from the Duomo, and you can walk around the center of Florence quite easily.
The apartment has utensils and basics, everything you need for a long stay. The washing machine is shared in a common foyer with another apartment.
I had some issues with the Internet not being high speed but Cinzia found a solution for me with a portable device. If high speed internet is important to you, be sure to discuss that with her in preparation for the trip. One quirk of the place is that the lights are automatic. For Zoom meetings, I had to regularly wave my arms to turn the light back on!
I stayed there alone and it was very safe. The place is also suitable for a couple and 1-2 younger children.