Am NOT a fan of a plastic pickup bed.
Even for an occasional use by those who own a pickup as a car
Have two plastic bicycles and will NOT take them on the local train to SF Giants games. Take my metal bicycles
Sure, there are evermore things made of plastic (carbon fiber)....mostly or too many to appease the LAGS and SOS folks (fashion statement crowd)
A helmet made of this new plastic is a good application. As they have been made of plastic filled with glass fibers. Now switching to carbon fibers and again, a very good application
Note, that helmets are a one time use thing....a pickup bed is NOT
Plastic shatters when impacted beyond their plasticity point....metal will bend/dent/etc after it goes beyond its plastic point
But, it is a personal choice and hope they know/understand the attributes vs metal...not just the bragging rights or cool factor