My stay was very comfortable and everything worked smoothly. I never met Simona personally, but she unobtrusively checked that everything was ok via a message and then quickly answered a few questions.
This is a perfect place for a conference at the convention center. I was able to have a quick, healthy breakfast in the apartment because of the kitchen, instead of going out every morning. The walk to the convention center was short and easy.
The apartment itself was very quiet, clean, and neat. The kitchen had the basics you'd need to do a bit of cooking, and even a pantry with some staples (not sure if they were left behind by other travelers, because it was an interesting assortment, but that meant I had a starting point).
Overall, I felt like I was staying in the apartment of a friend or relative who didn't happen to be at home, but was comfortable with me using their stuff.