I was an internal candidate who worked part time for the company for over a year. I was recommended by several colleagues for the position. The interview was fairly basic - interest in the position/company and my comfort with client databases.
I did not get the offer initially, but after another candidate fell through I was given an offer over the phone about a month later. However, it became clear that there would be no pay raise though the responsibilities and time commitment were exponentially greater. I had to turn it down.