sarj said:
and things don't slide like a liner. Liners bite... did I say that already?
Playing devil's advocate here. I've had both a liner and a Rhino liner each for at least 3 years (7 for the Rhino).
Yes, things slide around with a plastic liner. On the other hand, with the Rhino, things tip over because they can't slide. For example, with the plastic liner, untied full gas cans and tool boxes would slide around, playing pinball in the bed. With the Rhino liner, those same items tip over and roll. (Yeah, yeah, yeah... . I need to tie stuff down more often)
Also as for loading and unloading; the plastic liner allows items to slide in and out of the bed more easily. With the Rhino liner, items don't slide, and the results when doing so are either a gouged liner or the items have abrasion marks on them. So, considering the characteristics, each person may have their own needs.
Something else to consider, and this may or may not be a concern for you, is that with a plastic liner, you typically don't see dents in the bed. With my Rhino liner, I can still see every dent in the bed/fender wells - and I don't even abuse my trucks!
On my next go around (in my 06), I will probably opt for a rubber mat (I had one briefly in an old truck). Like the Rhino, items don't slide as well on the mat.