The best and weakest Polish MEPs. Who works in Brussels and how?

What is the activity of Polish MEPs in the European Parliament? In the fresh episode of the "European Summit" podcast, we print the first ranking of Europarliamentarians, based on assessments of 15 journalists dealing with EU issues. The politicians of the European People's organization dominate, but there are besides representatives of the Law and the fresh Left. Who got the worst grades?