Perfect stay (family with two boys aged 9 and 11)!
We received answers within no time.
The flat is just luxurious, perfectly situated and the view is really stunning. In summer, it could get hot but there are several air conditions.
It was clean (just one thing : the couch upstairs has some ugly stains) and the kitchen has everything you need. We slept with open windows as and the trams in letenská Street can be heard (it is a city!) but we found it sufficiently calm. The peacocks are louder than the traffic.. Hahaha.
We would definitely come back and recommend. I doubt you find an apartment with a better view from your bed, be it the city or the castle!