Friendly and conversational but professional. Had a phone interview with one person on the team before a second round with other employees. Final round was with the head of the department. A few mini-cases mixed in with general questions on CV and motivations.
Submitted resume, received call 2 weeks later. First we scheduled a phone interview. Following this I went to the office for an in-person interview with 3 employees/managers. Positive, standard experience.