I do like the Goosebox. Hooking up can be 'interesting' as with all ball hitches. :face palm: I like the ride quality. Chucking is at a minimum. I plan on installing Joy Rider shocks when I get it out of storage this spring. Besides reducing wear and tear on the 5r, I think it'll give us a even better ride. I like the clean truck bed when not towing. I like the quiet while towing.
As far as adjustability, are you talking about getting it set up? Reese recommends 7+" space between the top of the side of the bed and the bottom of the 5r. I've got 6+" and have no problems. When the dealer installed the Goosebox they had it at 4". When I questioned that, the answer was "that's where we always set it. Long story short, they replaced the entire bottom of the overhang. Then lowered the Goosebox 1 set of holes to give more clearance.
The Goosebox is a ball hitch. As SkiSmuggs said, most states require chains. Since the Goosebox and the Anderson are ball hitches, they will require chains in most states.
In my opinion, chains are a moot point under our configuration. Most 5rs' have a tongue weight somewhere in the 2000lb range. It'd be pretty hard to pop that off.
I've done a couple of mods.
I reversed the hookup for the chains. I installed I-Bolts in the Goosebox (holes already there). Then use a snap hook on the end of the chain. That way I don't have to climb into the truck bed to hook up the chains. I plan on getting coiled cables (as others have) to replace the chains this year.
I also extended the release cable. Again so I'm not climbing in the bed to release the Goosebox from the ball when unhooking. Easy peasy.
Sorry for being so wordy, but bottom line, if we ever get a new unit, the Goosebox is going with me. I even kept the original pin box to put back on.