I bought a used 2011 truck with these installed. The undercarriage of the truck is in great shape, no rust. But the spot where these brackets bolt on to the bars was rusted, and the rivnuts where the bolts connect just popped right out from the corrosion. I emailed the company to ask about replacement parts or warranty coverage--they had nothing they would do, and were curt with me.
Bottom line: if you want something that lasts longer than 4 years under normal wear and tear... look elsewhere.