Wonderful place to stay in Florence! We had only 2 people staying in the space but there is easily enough room for 4 people. It came with a full kitchen, stove/oven and dish washer, and pots and pans! Also, an easy walk from everything (and on a quiet street).
The one thing to note is that, while there is a very small washer, there is not a dryer, so do not plan on doing much laundry (we were trying to wash our clothes between two weeks of traveling and it didn’t serve our needs, but that’s okay!)