Pretty easy if you've taken calculus before. Textbook isn't super daunting since it's not huge, but the content that's in it is super important. A lot of the concepts show up in other classes that involve math (especially ECON 2009) so try not to forget it all once you're done.

Elena seems hardcore at first but she really is a great prof. Really good at explaining the concepts (especially since she wrote the textbook for this class).

Formula sheets are always a good idea, and the textbook/exam problems reflect what's learned in class, so make sure you go.