A friend of mine had Global Entry majorly foul up his paperwork. He was denied entry back to the US. 30 minutes later he was cleared, but he was told it's going to take them months to sort it out.
Sorry to hear that. That story is clearly the exception rather than the rule. Sounds like they sent him for secondary inspection, which can occur whether one is GlobalEntry or not. In my experience, and the experience of everyone I know that's gotten GE, the folks with CPB that work Global Entry really bend over backwards to make the program a success.
In the end he was admitted, no? As I understand the law, CBP can't deny entry to a US citizen - it is one's
right to re-enter the US. It may take some time to establish that one is a US Citizen, but once that's established one must be admitted. They can certainly "inspect" you and your stuff, and they can confiscate suspect or illegal items, and they can arrest you for warrants or criminal behavior, but they must let you in.
No thanks. I'll stick with regular passports. Total time from deplaning to walking in the front door of my house is under 60 minutes - and that includes walking to the parking garage.
So it may not be worth it to you.
For me and my travel patterns, it's been well worth the money and time invested - it has saved me countless hours (including the ability to take earlier flights when I come into NY, Atlanta, DFW, Chicago, etc.), and it will save me the need for additional passport pages because you don't get stamps coming back into the US. And if TSA ever gets their act together on their "trusted traveler" program, it will save me there. But I'm traveling every week or two, so reducing hassles at the airport is a big deal to me.
YMMV, and you may not want to do it. Everybody's different.