Couple with a 4 years old child, our stay at Jiri's apartment was great.
Checking-in was very quick and on time (actually Jiri was kind enough to let us check in a couple of hours earlier than reported in his listing).
The apartment's location is perfect. It's at the heart of the main touristic routes, on a crowded but very nice street (with people walking and shopping, no car traffic!), at very short walking distance from Charles's bridge, and yet it's really very quiet as the windows face only a small internal courtyard. The apartment is cozy and clean, the shower is great!
Recommended, would go back.