Petr's place was great ! Very spacious and clean. It is very near to a metro station and 10-15 min walking to the city center. My family and me stayed there 3 nights at the end of the summer. The las night we had to sleep with the windows opened because of the heat, so outside was a bit noisy. Not recommended for handicapped people, it has like 10 steps before you get to the elevator. Petr has the best exchange rate and charges no commission if you want to change money into Czech crowns.