Professor Decker was in the kindest words, the most boring. While I do believe Decker has great value in his lectures and is very knowledgeable in his topics, he is very bad keeping the students engaged. His lectures can get boring fast is not the most engaging either. His lectures are important and useful when the literature paper comes up later in the quarter. He's a well meaning professor.
Onto the class in general, I recommend this cluster for those who are interested in history, politics, and culture but also can deal with some more dense long readings. While the readings are helpful to understand lectures better, the reading isn't too important until the midterm when they expect you to cite some readings in the timed essay. When it came to the workload I would say it was pretty light, the first two weeks you are assigned reading forms to encourage doing the weekly readings and can be finished in 15 minutes. After this you have only two assignment, a political science paper explaining the choices you made in making a 15 second campaign ad from any president between 1955-1975. The final assignment is a literature paper on a one of two books due in December. The class is not recorded but lecture slides are posted on BruinLearn.
The only serious downside to this cluster would be grading, grading is completely up to your TA. Some TA's may grader stricter than others. In general your TA will make this class pleasant or difficult depending on their grading. I will highly recommend this cluster but do recommend you take into consideration the long readings and TA grading.