I just think of 5-5-5 squat routine progression. 5 normal squats at normal tempo, 5 fast drop squats then normal tempo up, 5 fast drops into explosive jump squats. I think the overspeed element with their overspeed squats could be dangerous to even an athlete with intermediate lifting experience of 3-5 years. I would just prefer my volume leg press or 5-5-5 squats over the overspeed squats.
