Towing a Ford Escape Hybrid Auto-Trans, 2WD

I have a 2006 Ford Escape Hybrid AWD. I tow it with 4-wheels down, and was told by Ford engineers that they don't recommend towing with a dolly at all. I have not had a problem towing it all over the USA, sometimes 400 to 500 miles a day. I learned the hard way to double check and make sure it is not in gear when you tow it. Both times that I did, even though it was very brief and not more than 100 yards, I ended up with a problem where the car would die after a few hours of driving. It turned out to be a pump in the transmission. This has happened twice, and those were within a day or two of starting off towing the car with it in gear. Towed properly, 4-wheels down, ignition key in the accessory position with all electronics inside turned off, in Neutral, I have never had a problem.

I am fixing to buy a towed vehicle braking system for my Fleetwood Southwind and Ford Escape Hybrid. I have been looking at the US Gear Unified Tow Brake. Does anyone have any opinions or suggestions, particularly with the same rig?