We enjoyed our stay very much. The flat is cosy, just right for 2, but could easily house 4 as long as you don't mind a squeeze. There are 2 sofa beds in the living area, as well as a comfortable bedroom.
As others have mentioned, the noise from the road is bad during the day, but it is quiet at night, just the occasional lorry passing through. pack earplugs if you are a light sleeper!
Communication with the host was good throughout, and Ana, who met me at the door, was charming.