We booked Ewa's flat weeks before going there and she has been very reactive and present via e-mails throughout this period. The flat was super clean and right in front of the Muzeum (3 min walk or so to the Metro A station which is pretty convenient when your going to the airport for 7am). If I were to go back to Prague, I would definitely try to stay again at Ewa's!
I am a 100% recommending that you do the same!! (Ewa, thanks AGAIN) Cheers!