Got an interview through my school's internship program. The hiring manager and current intern interviewed me. They tend to ask some challenging questions, you definitely want to think about your answers. You will definitely want to do your research on the company and culture before the interview, since there are many divisions to the company. The culture is laid back, yet professional, and the people are very intelligent and friendly. Know why you want to work for Microsoft and that your career aspirations are/what you look for in a job.