I have had all three....All three worked great.
Equal-i-zer was just too noisy...screeching, popping....wife hated it.
Dual Cam: Drilling for the snap up brackets was no big deal...Lots of adjustment and "dialing in" before it works correctly.
Blue Ox: very easy to install. I have a 90 degree narrow back in to get our trailer into the driveway. Dual Cam didn't like this severe angle and actually worked best when I un-hooked it for this maneuver . Blue Ox doesn't mind the 90 degree turn angle at all. It is also very quiet.
Again...all three did an excellent job of distributing the weight and controlling and sway.
