Jan and Sarah's place in Old Town was a fabulous place to stay in Prague. It was tucked around a corner and through an enclosed courtyard, so we were insulated from the noise and crowds of the Old Town square, yet so near all the historic sites, shops, restaurants and bars. We could walk just about everywhere we wanted to go. (We did take the metro to get to Prague Castle, which was fun too .)
The bed was incredibly comfortable; the hot water was plentiful; the microwave and hairdryer worked; and we had plenty of room to unpack our big bags and spread out.
Jan and Sarah were out of town when we visited, but their friend Filip had a taxi meet us at the airport, He also met us at the apartment when we arrived. He was very responsive to our needs while we were there. Jan also was in touch with us during our stay.
We can't recommend Jan and Sarah's place highly enough. We will stay there again if it's available on future trips to Prague.