Pros: Never moves once tightened Provides a neat adjustment without rework. Cons: The top nut was tremendously tight on my Focus 07 as the nut was still countersunk (use standard nuts, they're much easier to get to). The spring cap liked to jump out of the spring bearing. (Twice repotted before it destroyed the bearing. Warning lowering springs are used here) The lack of rubber insulation compared to the factory suspension leads to a noticeably stiffer handling. Pinching on the bumpers/mounting cups.