Paula's apartment is wonderful and exactly as pictured. The location is amazing and allows you to quickly get to the main attractions of Madrid. Paula is a fantastic host and her communication was very clear. She always responded quickly whenever I messaged her. I would recommend staying at Paula's apartment, but with a couple caveats.
Unfortunately, there was construction taking place on the floor directly beneath the apartment from 8am-5pm everyday. The noise was extremely loud and meant that I couldn't be in the apartment during those hours. I would only stay again if/when the construction was finished. Additionally, given the location of the apartment, it can get quite loud at night which made it difficult to sleep some nights.