I stay with my parents and my cousin at Mari's and it was really great. The location is splendid, definitely worth it if you want to visit the old Prague, and the place looks exactly like the photos, the beds really comfy. Mari was really nice with us and let us store our luggage in the appartment while the room was getting clean (because we arrived early) and also at the end of our stay (we left the room in the morning but still wandered in the city before leaving in the evening). She is the sweetest. Communication with her was perfect.
Big thumbs up to the map in the hallway : where to eat, what to see, where to go out. Brilliant idea, the pins!