Dugan is a very good professor who cares about her class and students. While the material may be difficult at first/along the way, if you come to class/pay attention the quizzes and tests will almost certainly be stuff you have already seen. She also allowed your final to replace your midterms if you scored high enough, which is always awesome. The final was pretty tough but fair.

Quizes are hard - she doesn't tell you what will be on it - so you just have to guess and hope for the best.