Phat Rat, I agree - If you're running a "new" truck with anti-lock rear brakes then the Old Style Electric/Hydraulic controller will most likely have issues. I believe the problem is that the increased volume in the rear line (due to the controller) messes with the anti-lock in the truck. I'd be tempted to try it (just to see what all happens)- but it IS said to be a NO-NO - so again I agree with you. Shifty - that "timed" controller I found to be annoying - it was ok for "regular" stops but when towing I am rather conservative when I brake - I would find that they would ramp up at a rate faster than I would normally require which became annoying. Backing up also became somewhat annoying as well. Constantly having to be aware of the controller and "pedaling" the brake to make it do what I wanted seemed all wrong to me. Now granted the one I had was a lower end model - I am quite positive that the higher end ones work much better. Some things I was cautioned about when I went looking: The "timed" controllers I simply found annoying - admittedly they worked good under typical conditions - other times not so much. The pendulum style controllers achilles heel was said to be hydroplaning. The electric/hydraulic - no longer made as they aren't compatible with anti-lock brakes. I also wonder if the "not compatible" part is a result of product liability. One manufacturer's product being inter-twined with anothers spells possible legal woes. In any event I thinkk ALL the models have Pro's and Con's - I would suggest anyone looking to buy one - do lots of research first. Surge brakes - I whoelheartedly agree with the previous comment that they belong on boat trailers!!!