Marcja was a very nice and responsive host. The apartment is exactly as pictured and was clean and bright. The listing also clearly notes that there is no A.C. (Which is ok, because it's not common in Europe). However, being street level, you aren't inclined to open the windows and since we traveled on a particularly hot weekend, the apartment was very toasty. Marcja did have a fan which helped us sleep.
The apartment is a 15-min walk to the metes station which takes 4 stops to Duomo.
All-in-all, a nice location and nice experience.