Three interviews are required plus an observation day. All are 1-1.5 hours (observation is longer even though they say it isn’t). Each interview is essentially the same. I was told not to worry about accepting an offer until I finished my interviews with other companies but then had my offer terminated anyway. I noticed these people tended to have a hard time admitting mistakes and always wanted to make sure they didn’t look bad. That seemed indicative of the type of people who will rise in the company. Boo.