Rock,
I'm not a company paid spokesman all I can say it worked for me, I saw it 1st on TNN Truckin TV, they held it in high regard during their review of it, you may be able to pull up the show archives that is what I did at TNNTV.com or some such address.
What led me to need it was crosswind acting on my Bronco II that I tow to the woods to abuse, keeping "my good truck" from getting tore up.
Around here we have multiple trucks our good ones, and work trucks, I go further to owning a woods truck sort of runs, but if I stick it in a mud hole and it sinks to the bottom not worth spending too much time on.
Anyway I took a gamble for $259 at the time found it met all claims of the advertisers, I have the 3/4T an 1T setup in mine, most of the time I don't know it's installed it really only comes into play with weight in the bed. But believe it or not cornering under power empty rear sway is lessened.
On my last big haul pulling my GN trlr at 18,700 GVWR total I had a rear axle wt of 4480, my empty bed rear axle runs 2760, truck bed was dead even with ground no sag, this thing is adjustable for more stiffness I'm at min setting, at install they say start with lightest tensioning and adjust to more stiffness if needed.
Tim, 98GM K1500 6.5TD(L56/L65), Heath PCM,3.73 gear,4L80 tr,4" exh,Amz air filt&dual oil flts, Heath remote FSD, TDO-7 clone turbo, Heath fan clutch,mandrel crossover, pilar gage BST/EGT/TRN, remote elec fan tran cool,alum trn pan