Josef's place is in a great location in the old city of Prague, within walking distance to all the major attractions, clean and well equipped for one or two people. The flat is on the 3rd floor (4 flights) without an elevator -- which I was expecting -- but it important to highlight if you are traveling with a lot of luggage.
If you enjoy being in the mix of a bustling city center this is your place. The open window facing the House of the Black Madonna gives good airflow and moderate city noise. But when closed, the sounds are minimal at night. The mini split AC was very beneficial give the temps in the 90s. I would stay at Josef's again.