I needed an apartment in Florence for 5 months and most of what I saw were very dark! This appartment is light and spacious, the bedroom is huge. The shower cubicle is small but there is very good pressure and lots of water. The heating worked in the winter and the aircon kept me alive when it was over 40 degrees. The kitchen has everything you could need and the fridge freezer is a good size. I had friends to stay and I was worried if they would be comfortable but the sofa bed is a good size and they slept very well!
Everywhere has downsides and it would not be an honest review without them. The appartment is right next to the Mercato Centrale and only 5 mins walk to the Duomo. It is noisy at night, particularly Friday and Saturday, but the host was totally honest about this before I arrived. It is also on the top floor with no lift.
But for me it was a great place to be. The guys in the market were really friendly and I always felt safe there. The landlady does not live far away and responded immediately to any messages. I would thoroughly recommend it. Enjoy!