Crossfire Dual Tire Pressure Equalizer, 80 psi

I'm thinking about adding the Crossfire Dual Tire Pressure Equalizer system on my PC.  I spent this morning reading websites about them.

Several postings on the Good Sam and RV.net blogs seem to be in favor of them.  My only hold back is the systems are preset for different PSI.

http://www.dualdynamics.com/crossfires/index.shtml
http://www.myerstiresupply.com/shop/shopexd.asp?id=743&info=Crossfire-Dual-Tire-Pressure-Equalizer-95-psi

I do keep my rears at 80 psi

Just curious if anyone is using this system

Bill G   

How many of these long haul truckers are using them? If they save as much money as they say, wouldn't the truckers be grabbing them and saving or is it just another thing to get our money? I think the later, but I only drive less than 10K miles a year in the PC.