The interview process was very pleasant, aside from waiting for extended periods of time to hear back from the company.
The process began with a very casual initial interview at my University. Two employees interviewed me for about half an hour, strictly behavioral. I then had to complete HOURS worth of assessments and write a short paper, and upon evaluation of those assessments was invited to the three-day-long College Summit at the Corporate Headquarters in Englewood, CO.
The Summit was very well-organized. All 50-60 college students present were flown out to Denver and stayed in the Curtis Hotel downtown for two nights. We had two elegant dinners (with the CEO) and spent a day in four or five interviews with executives. After being offered a position with the company, they have taken weeks to get back to me with the specific offer details.
All in all, though, a positive interview experience.