I bought this item because I plow and salt snow with a 2009 Ford F150 and I have a Timbren SES front (for plow weight) and rear (for salt weight). I am very satisfied with this product. As I work, I load over 3,200 pounds of bagged salt in the bed of my truck, plus the weight of the tailgate spreader, and this keeps the rear upright and keeps the hitch from falling. I chose them over airbags for three reasons: 1) ease of installation (very easy and quick), 2) I didn't want the airbag to burst or leak down causing the truck to lose balance. 3) Airbags can be damaged if someone raises the vehicle and lowers the axle during servicing without realizing that it is equipped with airbags. Timbren SES blocks do not require attention, they are there and only work when needed. The truck is very stable on the road. The handling is stiffer than stock when loaded, but retains the factory handling when unloaded. Overall very satisfied and would recommend.