That may be true using their goofy one bolt angle iron high and out front mounting method. Now look at the rubber bushings at the link end of the bar, none of them fit square to the bar or attachment point on shock bolt. After a few thousand miles of driving all the mess starts to wear and loosen up including the two bolts attaching bar to K member.
All I can say is Addcos mount sure hurt my eyes every time I looked at it until I reengineered the mounts. For about fifty more bucks in parts, and an hour or so farting around under the car, you can fix it.