I believe all the apartments listed under Lubos and Marta are run by their employees under the umbrella of Bohemia Apartments as the only people we spoke to while staying there were employees. This means that the quality control is not as high as you would expect. While the apartment has great views of the Charles Bridge and Prague Castle it is also opposite one the largest club in Prague and on the weekends has people leaving and arriving from 10pm through to 5am. This doesn't work well in summer as there no air-con and when the windows are closed the apartment becomes very stuffy. The location was within walking distance to all of the old town, but there are places out there for the same price that will not keep you up at night.