A bunch of volume. Do you NEED that much to grow? Probably not, which makes it inefficient, IMHO.
8 sets of 8 . . . if you're lucky, the first set of 8 will be heavy. But even then, it's not "that" heavy b/c you can do it 8 times. So you don't generate a lot of muscular tension. Personally, I think you'd be better off running a few heavier sets (3x3, 5x5, 5 singles, etc.) and finishing w/ 3-4 sets of 8 if you want.