A lot of good things here: Material is important; the course is interesting; professor is very knowledgeable and communicates clearly. The range of topics - from energy to education - is informative and relevant.
A few things that could be improved: 1) The course is quite dated and on a topic like this, not being current is a major weakness. Coursera needs a new edition. 2) A fair number of the questions on the quizzes are niggling, focusing on tiny, unimportant details. 3) Many of the slides are hard to read - rows of numbers that should be graphs, etc.
All of these things are addressable and would make a meaningful difference.