I stayed at Marek's place for a weekend. It is located in residential area with a supermarket, good number of restaurants and a lovely park near by. Easily accessible from the centre. The apartment was tidy and had all the necessary things for a weekend stay. Marek was helpful and quite flexible with check in and check out timings. He explained in great detail how to go about Prague and gave us some lovely recommendations(not so touristic places which is what we were looking for). He was always available and kept our bags at his place which was great. I will definitely recommend staying at his place.