CrossFires Dual tire equalization system? Pros, cons?

[Jack and Liz Pearce]

Howdy.
Our mechanic suggested that we use Dual Dynamics' CrossFire dual tire
equalization system on our Wanderlodge dualies.
Here is the marketspeak on this product:
"How Crossfire Works

Crossfire is a pressure equalizing and monitoring valve that is mounted
between dual tires. It bolts easily to the lug, hub cap, or drive axle
end. Properly mounted, air freely flows from one tire to the other,
maintaining equal tire pressure and load distribution."

Do you use this product on your RV? Any recommendations for it?
Comments, pro or con are requested.

Thanks,
Liz Pearce
1993 WL, currently in Cheyenne, WY