Man, I remember doing those in high school, too. I'd say they have their place. There are parts of the exercise that does build strength and power, mainly the first part of it where you snatch the weight up. I sometimes do a variation called high pulls which is that first part of the clean, but you don't flip your hands and catch the weight. It's sort of similar looking to doing the upright trap exercise if anything. I heard long ago that it was one exercise that will build huge arms, and I've always said to those who ask me about my arms to do pulling movements like high pulls, rowing, etc. They always seem to have the look of, "okay, that's nice, but I don't believe you," as if they are expecting me to say I curl 200 lbs, lol.