I enjoyed my stay at Carla's home. The room is small, but cozy, and comes with many amenities, from a selection of tea, to a TV with Netflix. The room is set away from the rest of the apartment so it feels quite private; I only saw Carla once during my stay. The apartment is about 5 minutes to the 1 metro, so you can easily connect into the city.
Highly recommend staying here if you're a solo traveler!