ATL is busy, so easier with Global entry to clear Customs. Clearing guns with CBP is very easy, if you have your 4457s.
I prefer non-stop ATL-JNB as it’s a short hop home.
The line for Global Entry was 3 times the others. Black customs guys treated us like hate crime victims. They stole chit out of my luggage, didn't resecure it... No thanks. a 20+ hour flight and then to be treated like that.
I would have to do a two day itinerary through Europe to go back.