I just put an Oedro tri-fold hard tonneau (amazon) on my new Ram 2500.
It is very well built, was ridiculously inexpensive @400, requires no drilling and removes entirely in seconds. There are a number of review videos on YouTube.
I had a Gladiator with an ARE shell before this. I did not want the weight or expense of a shell this time. I have never had a tonneau cover before and was not wanting a $1k+ commitment to find out if I like them or not. I have used the same brand "oedro" for floor mats and found them to be good quality.There are a number of "brands" selling what appear to be the same unit as the oedro, I have no idea if oedro is the oem or this is just a re-brand.
I'd post pics, but for whatever reason I can no longer do that on this site.
Note: I'm not promoting the oedro brand simply sharing my un-compensated personal experiences.