The acting of Bob Odenkirk and his surrounding cast, the cinematography, character development, themes... for someone like me who loves film as a medium, Better Call Saul has been a fantastic watch.
I tried Breaking Bad and didn’t like it. The nudity, sexual content, gore, amount of swearing, etc. did not appeal to me. Better Call Saul has been much more measured in its content, while having nearly equal the production value. So that’s my answer to the question.