If you visit Florence, this is the place you want to stay at. It is an easy 8 minute walk from the Santa Maria Novella train station. It is located next door to the Mercato Centrale (Go inside and get food from the host of vendors- it is open till midnight), which also has several blocks of street vendors around it selling their wares - leather goods, souvenirs, t-shirts, etc. The Duomo is a couple of minutes down the street, the Medici Chapels are around the corner and the Uffizzi and Palazzo Vecchio are walkable in less than 10 minutes.
At night, it is a lively neighborhood. We had no trouble with noise while sleeping in the bedrooms.
Most importantly, what you see in the pictures is what you get inside. Everything has been updated, there are plenty of kitchen items (glasses, plates, etc.) available for large groups (we are a group of 6) and the owner was very helpful and easy to work with.
Stay here. You will love it.