My DH had to do a US interview for his Nexus renewal. We flew to FLL on Jan 13 @6:15 am flight, it appears that the Nexus lane & others open-a little earlier than it says as we went through at 4am & he was waiting for his interview by 4:15 am unfortunately there were 5 people ahead of him. The US CBP did not open until 4:30 or whoever they saunter out. Anyway to make a long story short 4 people decided they couldn’t wait any longer & they took him & the first guy together to the interview room, he was done in about 20 min., he got to the gate about 5:20, 10 min before boarding. If everyone had stayed he wouldn’t have had time for the interview. So give yourself lots of time.