Katka's apartment is amazing and well deserving of all the 5 star reviews. It is comfortable - there is a danger of you preferring to stay in while in Prague. Katka herself is lovely and provided detailed instructions ahead of check-in.
Even though on paper it is located in Praha 5, it is very central and convenient to travel to all the sights in Prague, either by public transport or walking. There is a benefit of it being in a quiet residential area too.
No hesitation in coming back to this place in the future.