Brent is by far the best professor I have had here at UCLA. Not only does he communicate well with the class and explain the course material in an intelligible manner, he cares greatly about the student's understanding of the ideas and concepts explored in class. While the course curriculum was difficult, Brent's explanations and elaborations of the material helped me to not only comprehend the many formulas and concepts (ranging from magnetism to Einstein's Theory of Relativity), but allowed me to explore the concepts inside and out. However, I offer one caveat: His test curves are extremely low!! If you really want to test your understanding of the course material including your ability to implement the concepts learned in class in a variety of hypothetical physical situations, I highly recommend taking Brent's course. However, if low scores leave you emptier than the vacuum of space, you may want to opt for a more self-esteem-boosting professor. Be aware, though, that you are sacrificing the dedication and commitment of a devoted professor which, in my opinion, well outweighs any A grade.