I always use self-registration. If I want to know who succeed thus far, I go to each course and look at participants. I just did this for four courses, a total of around 150 students.
Out of the 150 students, maybe four or five needed my help (for some reason, they didn't follow my directions or the confirmation email never made it to them.)
One student had problems because she google searched "moodle" and was trying to log into some other moodle instead of mine.
