I kind of had my doubts about them when I ordered. I will admit that I really got used to them pretty fast when I was able to keep all my little things like oil, tools, etc that you normally take with you on a trip. Sure beats having them flying around in back of the truck or putting everything in a plastic container. These are plastic containers. Seem pretty durable too. Except for one thing, and everyone that has the Ram Boxes needs to check and see if they are actually locking when you lock your doors. I discovered, by accident, that one of my lids wasn't even locked when the truck was locked up. Who knows how long ago this happened, but one of the little green clips that hold the locking/unlocking mechanism in place had broken off. These are pretty thin at the point where you push them in, and I can see why they would break easy. I bought 4 extra for under $12.00 just in case the other ones crap out.
As far as losing space in the bed, I don't really see this as a problem as I just wound up using a Sidewinder pin box on my 5th Wheel to compensate for the wheel well area being taken up by the Ram Boxes. I think this is a better solution anyway for all short bed trucks pulling a 5th wheel, even without the Ram Boxes. No sliders needed at all, and I don't even come close to hitting the cab. Best thing I ever seen.
Also, I think that the Ram Boxes make the truck look good. It just looks more rounded and robust instead of just a squared off truck bed. Just my opinions. Thanks