The apartment is very well placed for someone who plans to walk around the city, great position next to the center and Trastevere, the host was quick to respond and gave us all the info. The apartment was clean, same as pictures, very nice :)
One thing: BE CAREFUL - being a quite old and charming building in a busy city, you hear a lot of what is going on in the street below. The apartment is next to the market square so you can hear the people arriving early in the morning to set up and it's in a lively night-area so you might have people partying until early morning. We had some trouble sleeping for the noise, some nights more than others. Everyone is different but if you're a light sleeper, keep it in mind :)