We arrived in Prague very late and didn't get to the apartment until 23:00. Magdalena, who checked us in, was very kind and patient, and she waited up for us. She even explained the map of the city and oriented us on the map—all things she didn't have to do at almost-midnight. We are so grateful!
The apartment itself was very clean and spacious (we were a group of 4). It was also well-located near the main train station and relatively close to the city center. Our only complaint was the lack of AC, but there is a large fan, and opening a window completely solves the problem.