I have weathertech cargo mats in the back of our Santa Fe.
Had them in my old Ram 2500. Worth it, imho.
Had them in the Chevy Trailblazer. Again, quality stuff, seemed to be a little thinner, but when I traded it in, the sales guy grabbed them right out of the vehicle. I could tell he wasn't going to sell it with the mats.
I plan on having them in the F150. For now I bought some cheap mats for the front for $40 that seem to divert water/dirt/etc and keep it from getting to the carpet. Haven't done it for the back yet and I really should have just gotten the Weathertechs.