I just helped a friend install a bakflip g2 on a Dodge ram. Easy to install, looked good.
With a locking tailgate, it's secure, opens from the inside. Can still haul tall item's, without removing the cover, although you loose the ability to use rearview mirror with it up.
There's some of the hard folding ones that also open from the front. So you don't have to open all the panels, or crawl in, to get something in the front of the bed .
Co-workers have soft roll-up covers, they like them .
I'm leaning towards a cap/shell. Of course, the most expensive!!
Drinkin coffee, missin fish.