This is just one guy's opinion, but any company which consists of one person probably isn't going to be able to honor a lifetime guarantee. Run, don't walk away from this guy. Run to your nearest Springfield dealer.......
"Guns don't kill people. Male Kennedy's kill people."
I agree with Gork, a friend of mine bought a custom 1911 brand named "Mitchel". The gun's never been reliable and the guy went out of business 6 months later. Now I'm waiting for my buddy to get really desperate and sell me that custom for under 400. At that price I'll have it tuned by my local guru for 2 to 3 and wind up with a tack driver, maybee
If the gun was built right you shouldn't need a guarantee. I have heard Springfield uses injection molded pieces too. I own a Springfield 1911 and love it, I also have seen people build extremely solid pistols from scratch that will out last any Springfield or Colt for that matter.
I too have been looking into having Mile High make me a .40SW pistol. I would like to hear from some owners about the trigger feel though.