I watched whole series some time ago, generally speaking it was good however I certainly disagree with some scenes and how director decided to present them.
Also this drama has caused a great discussions in Poland and was turned under heavy critics which included some diplomatic comments from Polish Ministry of Foreign Affairs, mainly due to the way polish resistance was presented (the train scene, the way Jewish people were treated, etc.) which in fact had no reflection in the reality. Heaviest accusations were in such form that it was a deliberate way of presenting the false events.
I personally like acting but nonetheless this drama was highly controversial.