I hope I'm not stepping on anybody's toes or cutting off anyone's income with my post.
I looked into this system a while back, and did a fair amount of research into the flow of the air conditioning system in an RV. I took mine apart and found baffles all wrong, ducts partially blocked, and a lot of things that could be improved easily to get a more efficient A/C flow.
I think this airflow thing would work great, but many have commented about the price.
Well, I also found a few YouTube videos that show you how to modify the flow like the AirFlow thing does, but you can make it yourself from off the shelf foam boards and foil tape.
I designed one that I could also make some use of the dumps, and still have good flow.
My build was a great success. I found the A/C was much quieter, and had a bunch more flow to the end run vents. I was very happy with the results.
Doug and Patience and Shelby the mutt
2015 Crossroads Sunset Trail Reserve ST26RB
2013 Ford F-150 3.5 EcoBoost XLT Supercab 4x4