For years I thought they were useless, Until last year the when my foot slipped off the peg and the rear tire pulled me off of the banshee and dislocated my shoulder.
After 1 surgery,6 months of thearpy, 3 weeks out of work (after surgery). If I would have spent the $160.00 I could have avoided the injury, And yes I do have a set of nerf's on now.