I applied to a general MBA internship posting in October (through an MBA conference) and was contacted in February to interview for a specific role.
There was 1 recruiter call, 1 interview with hiring manager, and 1 interview with the head of the team.
After making it to the final round, I unfortunately was not selected. However, I expressed interest in a different internship role and the recruiter facilitated the interview process for that one, which I ended up being selected for.
The process for the second role was similar, except I also had to present a 15 minute business case to a panel of directors.
Every interaction I had with the recruiters was professional and supportive. Before my final presentation, I was given the opportunity to have a coaching session with the hiring manager, which was extremely helpful.
Overall the interview process was as difficult as any other competitive MBA internship, but I felt like there was a supportive atmosphere and professional/transparent communication at every step.