Last week, we had a seminar about "How today's college students use Wikipedia for course-related research" written by Alison J. Head and Micheal B. Eisenberg.
From the seminar, we learned that 70 percent of students that were interviewed used Wikipedia in the beginning of their course-related researches in order to get general ideas. On the contrary, rare students ended their coursework with Wikipedia because of the lack of academic. These can explain why Wikipedia is a great place to start, but a horrible place to end.
As for me, I haven't used Wikipedia before, but I usually got ideas from BaiduPedia that is similar to Wikipedia. I used BaiduPedia because it provided me many different aspects of the research. Because both Wikipedia and BaiduPedia can be edited by all users, the knowledge mentioned is common and general. To college students, Wikipedia is not good enough to cite in their course-related researches.