This apartment is just as advertised and in a great location for those wanting to be in the middle of Florence. It's an easy walk to all of the sites and just around the corner from Ponte Vecchio.
The natural light is mostly just in the bedroom though there is a small, open air patio just off the kitchen where you can hang clothes to dry. The kitchen is equipped for light cooking. We didn't try to make any large meals here but did make eggs and coffee every morning without trouble, so it suited us just fine.
The A/C is a unit in the far end of the bedroom, so while it cools the bedroom enough, the kitchen (and third bed) are rather warm. For this reason, I'd recommend the apartment for only couples or single people during the summer heat. At other times of the year, I'd imagine it would be comfortable for three.
As pictured, the third bed is in (or just adjacent to) the kitchen. Whomever sleeps here should be prepared to not have privacy. This was fine for us as our toddler slept there, but his early bedtime rather limited our ability to use the kitchen or television. Keep that in mind if traveling with a child or someone who doesn't want folks walking by to get a drink of water at night.
Overall, this is great spot if you want to be in the action and have a place to crash. It isn't a lavish apartment, but you're in Florence, so it's really about the city, not the apartment.