cuberdrift: The idea is that you would play the entire volume without repeats once it is thoroughly learned. All the repeats are for the initial training stages.This Australian-Chinese fellow, Alan Chan, plays the whole volume on Youtube in 1 hour 38 minutes; but he is playing slower than the indicated tempos, and there are short pauses between each exercise. If he stuck to indicated tempos and did not pause at all, it would be much closer to an hour:He is representing something called "Con Brio Examinations (CBE) [which] is the world's first online music assessment system." The outfit is headquartered in Shanghai. Their Piano Syllabus includes Hanon exercises, in every grade up to grade 7, it seems. (In their Grade 7, students are required to play Hanon exercise no. 60.)