I applied through a recruiter. The process took 1+ week. I interviewed at US Army in Jul 2009
Interview
It was pretty straight forward, you take the tests and make good scores, you get a good job. Do not let the recruiters promise you things they can't lock in for sure. It is a lengthy process, so be patient.
Interview questions [1]
Question 1
Security Clearance process is very lengthy and uncomfortable
I applied in-person. I interviewed at US Army (Charlotte, NC) in Jun 2013
Interview
Came into the recruiting office, was immediately greeted by a sergeant with a very warm welcome and showed interest in what I was looking for and what my concerns were. Interview was informal but professional. Interview was more of an assessment of character and potential. The whole process involves drug testing, vocational aptitude, physical assessments.