Are you asking about the factory spray in liner, or a dealer installed product? The factory liner has the advantage of being sprayed by robots, which generally do a better, more consistent job. Unfortunately, it's also only covered by the 3 year warranty, not that it should matter, as I'm sure it will out live the rest of the truck. A dealer installed product would depend on what company they use, and how good the installer is but also typically has a lifetime warranty. This also applies to most third party suppliers.