None of my trucks are garage queens, kid taxis, office commuters, or grocery getters (though the Ranger does go to the supermarket sometimes and my kids do ride in my trucks sometimes as well). I have always used my trucks all as real trucks, for working, playing and getting stuff done, not as glorified station wagons, with a bed tacked on the rear.
Yes, I have used the Herculiner product. I put it in the bed of my utility body back in 2007. I also put it on the tailgate of one of my trucks back in maybe 2004 or so, as well as on the top surface of the rear bumper of the same truck, at the same time as I did the tailgate. I also have Rhino liner in the bed of the same truck.
Considering the above, this is what I have to say about bedliners, Herculiner in particular...
The Herculiner is a good product. It has held up very well in the bed of the utility body and has done ok on the tailgate. I will certainly use it again in the future. I have been planning to paint the top of my truck mounted and jobsite-use tool gang boxes with it for some time now, just haven't got around to it yet. Same with the bed of my Ranger truck. I will put Herculiner in that one too, at some point.
It did not stick well at all on the chrome bumper surface, but I would surmise that likely nothing else would have stuck very well to the chrome either. Typically, painting over chrome is a bad idea and whatever is painted on there, flakes off. This was true of the Herculiner as well.
The Herculiner is a harder surface than the Rhino liner. Rhino has better 'sticktion', whereas Herculiner allows a little better sliding. This can be good or bad, depending on what is being hauled in the bed. A harder surface is better for shoveling dirt/rocks/etc. A more sticky surface is better for hauling boxes of items, etc.
Pallets loaded by forklift do not like to be slide very well on the softer Rhino liner bed surface. I would not put Rhino on my flatbed truck's bed surface, or on my utility trailers (if the floors were steel plate), for that reason. The harder Herculiner and Line-X liners are better products, for that purpose.
I think my truck camper would certainly have slid around a lot more in the bed of the truck, if I'd had Herculiner instead of Rhino. The softer, stickier Rhino helped keep the camper in place, such that I did not need to use a rubber bed mat under the camper, as many do. With Herculiner or Line-X, I would likely have used a rubber bed mat to help keep the camper in place.
The soft Rhino liner is comfy to crawl around in the bed of the truck on my knees. Herculiner is not so comfy. For a camper shell application, where one hase to crawl into the bed to load/unload items, Rhino is the best choice.
So it really depends on how you intend to use it, which liner is best. That said, the Herculiner has proven to be just as durable a product, for me, as the Rhino has. I'm happy with both. Herculiner is certain much less expensive, for those who don't mind putting it on themselves. I don't mind, though it is very messy!