We've so much enjoyed having such a central apartment with literally less than a minute to Charles Bridge view. So yes all the description is very accurate.
This also means that it seems privately run rather than super professionally hosted - whilst having a cleaning person which in our case did the check in. When we needed an extra sheet and unfortunately none was at the flat Jan came all the way to bring us one. Klara could maybe add that detail that (sometimes?) Jan is taking care of hosting. He's a really nice guy and we enjoyed dinner a lot at the restaurant he suggested.
On hot summer days it might get really warm in the attic as it already was a bit warm when it had 24°C and sunny weather as indicated there's no AC - and it isn't easy to reach the window.
We paid ~260 for 3 nights and 2 person so what we got was good to really good value for us.
If we'd come to Prague again we'd be happy to return.