> Do the additional sets work better for people starting from low fitness levels? Yes, because they cannot handle too much weight and so, their training volume

> Do the additional sets work better for people starting from low fitness levels? Yes, because they cannot handle too much weight and so, their training volume is very low even on 5 work sets. Note that the body will catch up pretty quick and 5x5 will be too demanding after 9-12 of solid training. Also, SS is much more technical because of the power clean, which is a very demanding exercise. You cannot possibly do 5 sets of power cleans without putting you in risk of injury.