A phone screen with a recruiter about background/experience/interests followed by personality/behavioral based questions. Then I had a group in person interview with two folks from the sales and marketing team respectively. Fairly casual, they wanted to know why I wanted the internship/ what I knew about them and what I would be willing to do on the job.

I went through three rounds of interviews. I met with lower management, HR, and the COO. It was relaxed but very professional. They didn't ask me any questions that I thought were unnecessary or unfair. Overall, a great interview experience!