Follow-up ...
I did try this 'clean and lube with silicone' method on two firearms after last weeks range day.
From a cleaning standpoint it seems to work just like any other spray lube ... cleans deposits of carbon ... wipes away easily ... the barrel interior shines just as it would with oil ... firearm cycles just as it normally does ... trigger feels the same.
It certainly does leave a nicer luster on the exterior of the gun.
After shooting the same two pistols again today they both functioned perfectly, as they always have with oil. One thing I did notice is there was no oil weeping from parts (ie: below the slide or around the take down pins).
Just my experience so far ...