Most of us don't bother getting our own FAA waivers so we only launch HPR with clubs that have already have pads. That limits my solo launchs to Class 1, LPR and MPR. For that, I built a pad from scraps laying around my shop and a few more $$$ for some 1/8" 3/16" and 1/4" rods.
I've never used that pad, so I can't comment on quality. For myself, it isn't worth the money, not because it's not a good pad, but it is a lot more pad then what I need for LPR & MPR. For a club looking for pads, it may be a great value.