The anti sway feature can be a little startling if you aren't prepared for it. I didn't even know I had the feature until driving in the DC area. Living not far from DC gives me the benefit of knowing the people around here are morons, but even that knowledge isn't always enough. While trying to make a lane change, signaling well in advance, I started to move toward the middle lane from the right lane, and then after already crossing the dotted lines, some bone head decided he needed to go to the middle lane from the left, and he certainly wasn't going to wait for me (he was too important and had to pass the guy camped in the left lane). Naturally I jerked the wheel back to the right, not hard, but as much as was needed to avoid the accident. The moron almost sideswiped the car in the left lane that he was passing, because he knew he had to squeeze in. It wasn't like it was incidental, he knew I was getting over, and rolled the dice that he could beat me. So my avoidance maneuver made my truck go into anti sway mode, and it was a little startling, similar to if you have never used anti lock brakes before. If you aren't expecting the sensations, and odd noises, it can be a problem. The truck did its job, accident avoided.
I have a 2015 F150 XLT, so I cant speak to the Lariat, but mine does not have the "Low/Medium/High" options. The options my truck has are "Electric/Surge/None" or "Electric Over Hydraulic (EOH)" as the brake options.
2015 Rockwood Mini Lite 2504S
2015 Ford F150 Ecoboost