We did the communication with Lucie, Petrs sister. She was absolutely perfect: she helped us to find the most convenient private parking around (parking is a problem in Prague), she was waiting for us one and a half hours because we got lost and we were stucked in a traffic jam (thanks Lucie!!). She helped us with tips about restaurants, cultural options even also checking with her friends to give us more extended info. Always welcoming and nice, for us her treat was just excellent :)
Regarding the flat, is as expected by the pictures. The best part is the location, as we could explore the city walking. Clean and renewed. Although the sound of the street can be heard, it's not a busy street at night so it won't disturb the sleep. Nice Bagels breakfast place just around the corner. We recommend it