13 years now with the Rhino Bed sprayed on liner even up and over the sides and it still looks new on our 2004.5 GM HD truck and it still grips stuff so it doesn't slide around. Absolutely love it! Our truck is always outside as it won't fit in the garage and is used for RV'ing with the big over 11' Lance TC or our Carriage Carrilite 5th wheel.
Had LineX on one truck years ago and it was hard and slippery and very quickly had gouges to the painted bed metal and thru the paint in a couple places from the stuff sliding around like mad. Looked like c r a p in just a couple years. The LineX was Slippery as snot! NEVER again!