Overall I had more then 4 interviews, each of these were re-scheduled for at least once or twice.
I've found them kind and enjoyed all the questions asked, but at the same time I was worried about re-scheduling part. And I was right... Just at the end of last inetrview some manager named Levon entered the room with smirk on his face and asked a question totally not related to the position I was applying to. Fortunately, they decided not to proceed and I was very happy, as working with unserious and not professional people is a hell.