Two HireVue interviews and a day long interview process at their office. Typically 6-7 interviews in-person. Then, candidacy is evaluated by the panel.
Interviews were not very difficult. They try to check if you would be the best fit for the company and whether you would be interested in the job they are interviewing for. Basic practice should be enough to breeze through the interviews. Easier compared to other interviews. Difficult to impress the interview panel as they would be looking for the perfect fit.
Interviewers are very friendly, motivating, care to know more about you, understand the pressures of the interview and try to help you as much as they can within the limitations.