I cannot say enough good things about Agense's flat - in short, book here if you are going to Florence. The price is reasonable - and the flat is totally perfect and cute. It is exactly as the pictures show, it is bright, and so well appointed - with cute couches and eating area, cute bathroom, and great loft for sleeping. Location wise, it is also within 20 minute walk of everything in Florence (Including the train station) so you don't need to deal with cabs.
Agnese is a great and gracious host - he was easy to communicate w/ via text, and upon check in gave us a quick overview of Florence and some great recommendations for real places to visit. We really appreciated his thoughtfulness. We also asked for a late check out and he was kind enough to arrange for a place for us to drop our bags while we fit in a little more Florence.
I stayed in many Airbnbs on vacation, and Agnese's was the best place I've stayed at - great location, great price, and amazingly cute flat. Highly recommend.