Everything was great. Petra went to pick up us at the train station! The studio is cozy and it has everything you need to stay there. Good wifi connection. Perfect location so we did everthing by walking. The toilet is private but it´s outside the flat, so don´t drink too much water at night :)
Petra left us some maps and books from Praga, she also sent us a mail with some tips, she is a wonderful hostess.
She recomended "Lokal", a traditional czech kitchen, and it was very good!
I would recomend this place and we will come back, thank you Petra!