Tried them out. Mowed 2 foot high very dense bluegrass with a craftsman push mower. That was the only place it bogged down but it still cut the first pass. I think another benefit will be reduced belt slip due to increased momentum from the extra weight of the blades. In the tall but less dense area I had it side discharging & it still chopped about like mulching used to. I’ve already been recommending them.