I spent two semesters studying Chinese here at Tsinghua ... As I skipped the first course, the start was quite rough, but the second one ran much smoother. We had some nice moments here, especially at the second half, when a nice girl brightened up my life :-)
And I should not forget to mention that it is the best university in China. If all Chinese students would study as hard as the ones here then China would probably overtake the US by 2020 already ...