We loved our stay at Zsofi's flat. She arranged a taxi for us from the airport and then her friend, Walter, met us at 10:30PM to gain entry. Walter had tons of recommendations and the flat was fully stocked with beer, water, coffee set-up, toiletries and helpful map. everything in the flat worked properly and was completely secure.
The flat is quiet and off the street in the back of the building but a fantastic location that is only a 10 minute walk to old town square. We would absolutely come back on our next trip to Prague.