Very friendly host. Accepted my arrival around midnight. Gave helpful hints about parking and the stay in Prague. Ensured that we have everything we need.
The apartment is modern and good.
With 2 caveats:
1. The elevator is being replaced right now, so you have to use stairs to get into 4th floor (3rd above ground).
2. Air conditioner requires some fumbling with the hose. You basically need to open the window wide, pull out the hose and close the curtain for it to have any effect.