Not too difficult. Standard questions. More of a see if your personality fits well with the culture. Screening beforehand by phone is thorough so if you're getting an in-person interview you are qualified from a skills perspective.

The first interview was over the phone. Standard questions. The second interview was in the office. The HR rep was unavailable, so the interview was conducted by a couple of the managers. This was the 'logic' interview where they asked two questions to see how your mind worked. The third interview was the 'behavioral' interview; again with two managers and the hiring person I spoke with on the phone the first time. The interview was not hard; just seeing if I would be a personality fit. What irritated me was at the end of the interview, the hiring person on the phone specifically said she would get back to me with next steps, and then nothing...crickets. I sent a follow-up e-mail after a week - and still nothing. If you have decided not to hire someone, but have told them you will get back to them, then get back to them. It's business people. A little common courtesy goes a long way.