First interview was a bit challenging as the questions asked were super complex for an intern position. Got a second interview and got another interviewer who were more laidback and casual as the interviewer just wanted to know more about me to test chemistry to join her team. I'd say it depends on the person interviewing you to make it a difficult or easy interview.

Very easy and casual. All the interviews are friendly and easy to talk to. Only 2 processes : 1 screening call, 1 online interview. The screening call are the usual stuff like self introduction etc. Then the online interview is basically a vibe check where I spent 30 minutes casually talking with the 2 interviewers who are very friendly.