I've been looking for more info about the sway control aspect of the blue ox. If you watch the manufacturers demo video they claim that when the trailer is out of line it loads one bar more than the other and 'corrects the sway'. According to their video if the trailer is (for example) swayed to the drivers side the passenger side load bar will be bent more and apply downward pressure to the passenger side of the trailer A-frame. They further claim later on that the bracket 'secures the chain preventing sway'. However in the video there are still several links below the bracket, so the chain is more 'secured' that than many but it's in no way fully secured.
I'm not sure how one side bar will be stressed more without the other bar being stressed the same amount via moving the opposite direction.
Best I can tell the only way it controls sway is by applying downward force to the a-frame on one side, if that slightly shifts the trailer weight to one side I could see that moving the trailer back inline with your vehicle.
However to me the sway control on this design doesn't seem likely to work as well as other friction based anti sway devices. Not having one to actually look at, hard to try and make any good analysis. I tried finding more specific information on the anti-sway aspect of this hitch without any luck. It may depend on lot on trailer design as well.
The hitch has a lot of other nice aspects I think, and it may work very well with integrated brake controllers that have anti-sway built in (love that in my RAM, don't even use anti-sway bar anymore).
