It works well if the flicker is at 100 hertz or 120 hertz (or their multiples). It's revolutionized my keeper rate and post processing workflow under typical high school and small college football/baseball/gym lights. Not only is color consistent from shot to shot, so most images can be batch processed, but the shutter release is timed at the peak of the lights, so it can give a 1/2 to 2/3 stop faster Tv for the same ISO and Av. If light from more than one light tower in different phases are both illuminating areas in the frame, then the shutter is usually synced to the brightest source at its peak, but it is less effective in such cases.
Bryan at The-Digital-Picture wrote an article about it a while back when it first came out with the 7D Mark II.
Wow, that's awesome! Thanks for replying and for sharing your experience. I'm going to enable it right now