Jan was a great host, he certainly made us feel welcome :-) We visited Prague on New Year's Eve and he kindly included a bottle of wine for us to have a toast in the "Submarine". The flat is great, it is in a quiet and pleasant neighborhood, near to the tram stop where you can directly take tram 22 to Prague's major attractions. We loved the fact that in the neighborhood there are local pubs and small restaurants open until late, so after a long day of sightseeing you can always come back and have a good Czech beer before going back to the flat. Rooms at the "submarine" are spacious and very comfortable, and Jan provided us mobile phones to be in contact with him in case we needed any help around Prague. We loved our stay and we definitely recommend the "Submarine on a Hill" for staying in Prague! :-)