I have a Jordan and like it real well overall. I have had a problem with it hanging upwhen it's real cold. I attribute that to a probable slight mis-alignment which I haven't tried to correct yet.
After saying that, I towed for years with a Prodigy. Except for being more difficult to adjust correctly for all conditions it was fine. When you have it set up for max performance on the road, you get some jerking in a parking lot or coming to a stop. Frustrating at times. The Jordan is much smoother operating since it activates in direct proportion to pressure on the pedal.
Many will say to only buy the BrakeSmart control. It's quite a bit more money and I believe you have to tap into the brake's hydraulic system. I didn't want to do that. I would use the Prodigy if I couldn't get a Jordan.
Dan