Not too easy. Not too difficult.
The homework is much short but covers every kind of problem you might encounter on a quiz or exam. Most stem majors are required to take up to math 2d and Davis makes it easy as long as you're willing to do all of his suggested (not mandatory) homework as well as the online weekly homework.
The highlights of the course would be learning about vectors, derivatives, integrals, contour maps, and various formulas built around them, all with 2 to 4 variables. I have a friend in math 2A and it became apparent to me that we learn most of the same topics at around the same time, except with 2A being single variable calculus and 2D being multivariable calculus. So if you have already taken 2A, you already have a good idea what you'll learn in 2D, some formulas which are fairly similar in both courses.
Hours per week:
Advice for students:
To succeed, all that you really have to do is to do the homework given and make sure you understand it. The quizzes often have the same exact problems from the textbook homework or discussion. The exams have different problems but a practice exam with answers is given prior to an upcoming exam. This practice exam is given through the class website and is a pdf so you can practice as long as you want, the answers are distributed a little later but show step by step how a problem is done, less than 10 problems in total. The lecture and discussion before an exam is often saved for review problems, so partake in those to refresh older topics.