It's useful if you want to go into pure mathematics, where proof techniques are essential. Keegan is a really nice lecturer.

A personal advice for anyone who wants to go on to take MATH 320. Success in this course does not guarantee sucess in MATH 320, which is drastically more difficult and rigorous. Although I do encourage people who find this course interesting to go on and take 320, it would still benefit you to prepare yourself for the challenges in higher level math courses.