That was our first time in Prague, and living in queen bee apartment helped it became absolutely lovely. The location combines both good infrastructure and privacy, because everything is so close (Charles bridge, subway, Kafka museum, mini market and cafes), but the street is not so crowded and it's quiet and nothing interrupts your sleeping. Plus, the apartment is so lovely and, i think, it absolutely transfusés the atmosphere of Old Prague. The host, Lenka, left useful tips for us and both quickly answered on all our questions.