You go through security just like you would at any "non-KCM" airport. Not a big deal. Don't have it at my carrier and often time beat other guys through who use the KCM line. Unless it was at the BFE airports I fly to, then I'd only use it 1-2 times a month maybe. I could see it as a big benefit to someone commuting ORD/ATL ETC.

Doesn't do my group a ton of good when our most exotic destinations usually consist of 6-10 gate airports. Either way it'd be nice to have.... But I can live without it too.