Extremely well located (2 min from Charles Bridge) and quiet street for being so central.
Lucie was very flexible regarding our arriving and departure time which made it easy for us. She acted direclt when we needed her.
The only drawbacks were that the studio is extremely small and my partner who's 2m tall couldn't really go around, nor shower properly (which we should have assumed knowing it was under a roof) and there's no big reserve of warm water so you need to coordinate for showers.
Convenient place for a short stay in Prague!