The trip was a delight from beginning to end.
Communication was prompt and easy. The PDF guides that Sarah sent through before we arrived were well balanced, useful, up to date, and, having explored and tasted several of the recommendations, benefited from being written by locals who knew their city; - we hit the ground running.
Clear instructions were provided for transport from the airport to the apartment, with options to travel by express service, public transport, taxi, or private transport with Jan, with prices given for each option. We opted to travel with Jan both from and to the airport, which worked well.
The apartment is a 1 minute walk from the Old Town Square. Despite being right in the centre of the old town, the apartment is a haven of tranquillity; only when you emerge from the tranquillity are you reminded that the hubbub of city centre life and activity is on your doorstep.
I suspect public transport is good, though, being based in the centre of Prague, we walked to everywhere we wanted to explore. We did use the funicular railway to travel up the Petřín hill (after breakfast at the Café Savoy).
The apartment itself is perfectly comfortable: spacious, comfortable bed, TV (with Netflix), good shower, (no bath, which was fine for us). I suspect the kitchen facilities were adequate, though we chose to eat out. It was lovely to look out on the secluded garden.
Sarah, Jan - thanks for being so welcoming.