If you work out of the back of your truck, I think a liner of some sort is a good idea. I honestly believe that all the OEM's in an effort to make them lighter/cheaper have removed alot of material from the bed and they count on the end user to add strength back in through a bedliner of some sort. I have used spray in since it became available and it works for me, doesn't protect against dents as stated but it does help to keep things from sliding around. As thin as the beds are putting some protection in the working end of the pickup isnt a bad thing.