HR first through my MBA school, skype with people to decide where to go. 5 months later Mexico's HR finally decided and set me up with MKT director and HR director. Very easygoing interviews, no case or situation question, mostly background and previous experience.

Nice and professional team, they kept a professional tone. I didn't get the job in the end but it did get a good impression of the company. i did howeverer get the impression of a quite complicated internal structure with many people to keep track of.