We did not have a pleasure to meet Radka, but her husband Peter welcomed us. We were late because we lost 3 hours on SER-HUN border, and came to Prague at 10PM, yet Mr Peter was very understandable.
Apartment was as described and even better. Clean and comfortable. Supermarket is really within 5min walk distance. Close to public transportation. Only fey minutes of walk from metro station, from which it takes 10 minutes to downtown Prague. Also, next to metro station, there is another supermarket, few stores, one or two pharmacies, two restaurants............
Quiet neighborhood, great location, quick access to Prague ring road...........
Even if we did not spend to much time in apartment, because of city-exploring, it offers all that you need.

Highest recommendation.