An adaptation demands adapting, of course, and while many elements are different, executive producer Tomasz Bagiński said some changes are 'necessary' but 'painful for us too'. Some fans of the book series complained Netflix made unnecessary changes or missed key points. Executive producer Javier Grillo-Marxuach also spoke out in defence of Netflix's commitment to the books. Showrunner Lauren Hissrich denied this, however, advising fans to not believe everything they read. A PR storm also emerged after a former Netflix producer claimed some Witcher writers 'actively disliked' and even mocked the source material.