They have a rediculously large amount of field experience - the two of them have travelled all over the world giving lectures, working with Medicins sans Frontiers, and other research. They mostly work at the School of Public Health, but teach this undergrad seminar.
I learned a whole lot in this class. Unlike previous seminars where you're supposed to "read" 400 pages a week, this was about 50-100 pages of manageable reading - and always extremely interesting. Also, instead of having to buy either a lot of books or an expensive coursepack, the Rothmans post all of their lectures on line. Sure, it will kill your paper quota but it's fine at the end of the day.
The topics in this course were very interesting - it began with the Human Rights doctrine, hippocratic oath... then to Nazi Medicine... and more recent issues like female genital cutting, organ trafficking, and AIDS in the third world. The Rothmans know so much about everything and they were able to play off each other well (think of your grandparents - except holding PhDs). They wonderfully moderated discussions, and really opened my mind.
The class was all discussion - and it was great. The paper was 50% of the grade, but we had no drafts due, peer edits, etc. The whole thing was to hand in the paper on the last day. All he said was "publishable length." So about a minimum of 15 pgs. Many people wrote closer to 30 pages. I have no idea how it was graded, or if it wound up counting for more than 50%. However, I will say that your paper better be really good because it doesn't seem like this course is an easy A by any means.
Take this class... you'll learn so much from it, and don't focus so much on the grading (or lack thereof). Also, David Rothman was once featured on the Daily Show (in one of those segments). Ask him about it.