Everything was great. George was waiting for us at the arrival at the airport and drove us to the flat. He has been kind enough to let us store our luggage in a safe room while we were waiting for the check-in time. We had a little issue with the hot water which has been resolved within the day.
George also let us stay later on that the check-out time since the next travellers were supposed to arrive the next day.
The flat was clean and located in a perfect spot in Prague!