It's funny you say you noticed no difference even with both antiswaybars gone.
I certainly did with just the rear antiswaybar being inoperative. The 3 Boy Scouts with me did too after a rear antiswaybar broke unbeknownst to me while I had them out with me doing a little offroading out in the desert. We were heading back over a long twisty mountain road and, literally, all of us noticed a lot more sway in the rear. Very noticeable. The kids were actually going a little overboard with how dramatic they were reacting to the additional sway. I stopped 2-3 times on the way home trying to figure out what happened but didn't find the broken link until several days later. And breaking just one link disables the entire antiswaybar.
To me I noticed a dramatic difference in handling even just with just my rear antiswaybar being inop, let alone both of them. Really.
