Alfaro taught the macroevolution part of my LS1 class. He's very fair, very concerned about student understanding and their perception of the fairness of the class (he throws out quiz questions that he thinks might have been too difficult, and puts funny extra credit questions on the exam). He wasn't a very interesting lecturer but he tried to be good, and honestly not very many professors do. He holds extra office hours before exams, and tries to learn as many names as he can. So take Alfaro,and go to his office hours.