The interview was 30 minutes. The interviewers were very kind and didn't ask any "got ya" questions. It was much easier than anticipated. Have not heard back about the results yet.

Interview was straight forward and professional. The really challenge is after you receive a tentative offer. From that point, you are at the mercy of security clearance and the process may or may not take forever, and you will be in a limbo. I wish they warned applicants about this.