Katka was very friendly and helpful. She gave us great advice regarding where to eat, (Cafe Lounge is a wonderful breakfast place and Olympia Kolkovna a very tasty Czech restaurant) and how to get there with a reliable taxi from the airport.
The apartment is clean and new, all the equipment is new and the balcony is wonderful when you need an hour to relax in the afternoon, before getting up to prepare for dinner. We actually had trouble getting ourselves motivated to leave the apartment, sitting there in the sun with a glass of wine :-)
The neighbourhood is a good one, quiet and safe. There is a shopping mall very close by and all the major attractions are walking distance.
The only thing I didnt find 'perfect' was that the shades/curtains in the bedroom allow for quite some light to come through so I generally woke up around 5 in the morning. Bleh. My husband woke up at 5 too but fell back asleep after 10 minutes. So if you are sensitive to light, bring an eye mask.
PS. If you fancy dining out in the top end, book at Bellevue, absolutely marvellous food (the cheese and truffle-honey were to die for), though you will of course be paying a very big bill. We might have tried the Alcron too if we had been there longer.