The first time I interviewed here, I didn't get the job. Instead, it went to someone who had interned there. (Pro tip: Wiley very much favors interns.) However, HR saved my resume and called me back a month or so later for another position. This time I got the job.
For the interview, you meet with HR and the hiring manager. Both interviews are pretty important from what I can tell. HR wants to make sure you're going to be a good fit with the company and the hiring manager wants to make sure you're a good fit for the job. Basic stuff.