Our stay was very good at Jan's apartment. Prague is really beautiful, even though it was really cold (-13°C) for us.
The apartment was nice, very cosy and well decorated, just like shown in the pictures.
We got lost looking for the place, but a very friendly policeman helped us to find the street. It is kind of tricky to find the street.
When we arrived (we were late) Jan was waiting and let us in. He explained how to get to the city center, which takes only one tram line (line 17) and answered other doubts we had.