The apartment itself is quite good, the living room is authentic and this is where you want to live while you are in Florence. It's located about 15 mins from the SMN train station and the same time to other touristy parts of Florence. Apartment is good for two, however it can fit up to 4 people - there are two cots which can be placed in the living room. However to sleep in the living room is very hard - it's very noisy there, windows cannot be tightly closed, and so the noise comes through as if the windows were open. Also there is no doors in the bedroom, so you will here the street noise too, however not so much.
There was one disappointment for us - in the kitchen were only two chairs and there is no other options in the apartment for the third person to sit somewhere .. Hope the host fixed this issue already.