Depends on a lot of things, such as if you plan on bombing, how long you plan on keeping the truck, etc. I got the ext. warranty on mine because I do not plan on bombing, and intend to keep the truck for a long time. One other thing to keep in mind is that the ext. warranty covers a lot of the DC weak links - AC evaporators, front end parts (no idea how well the 3rd gens will hold up compared to the 2nd gens yet), etc.