I'm using Tekton and they warranty them without question, as for this posting and prior. It's an impact and you beat the hell out of it. Also note that adaptation happens and good tool companies adapt. A Tekton impact wore out on the 3/8's drive end and the one I got has more time on it and it looks good as new as of this point. They changed tooling and improved their product in that particular model. Impacts are soft by nature and I guess they were a taaaad too soft and hardened up a bit more on the drive end. Socket end on both looked good, it was just the earlier driven-end that wore and that's the thicker part of the socket (mass).
I'm also a SO buyer and that's where you get into a deep debate that's larger than this one thread and it's all about the person on the truck. That's a truck-tool thread that can even be splayed 50 different ways besides the tool in question, itself. All of the trucks can have good or bad people on it. When you buy a lifetime warranty tool that you pay for "Made in America", then you expect it and sadly bad truck owners will put a stink on every bit of that promise.
Don't buy a truck tool if you don't trust the person, not the tool. That person could go away and you run into the next truck guy that you never bought from them so they don't wanna take the risk on you in order to warranty the tool from the prior owner that moved to another route. I don't understand that still unless they're thinking we're all truck-bed thieves.
Anyway, they all talk, focus on the tool, and an impact socket set will eventually wear out. I'd rather build experience with this on a lower cost set just to see how much time vs money spent on that one tool over which brand. Going straight to a Truck Brand is a fool's errand and I tell that to the boys the same as anyone here. That truck step is DANGEROUS!
TL/DR: Tekton/Gearwrench/Something in the USA or attempting to be full USA.