I spoke with an HR representative several times (probably 1.5 hours total of phone time). The interview style is very conversational, not behavioral interviewing, no real "hard ball" questions. Because i had another offer on the table they did all of my face-to-face interviews in one day (3 interviews, 2 one-on-one, and one with 2 interviewers). The people are friendly and welcoming. The building is very nice, so be prepared for that or you could get intimidated as a reaction (the, 'uhh, i may be out of my league' knee-jerk reaction if you aren't a confident person). Dress sharp, be prepared, speak clearly, concisely, bring some ideas to the table, and as always, do your homework! Your best bet for scoring an interview is to get an employee referral - use your network and be persistent yet professional