Initial step was a 30-minute on-campus interview at my university. From there, took actually quite a while (3+ weeks) to hear anything back. This delay was the only negative part of the process in my eyes. Once I heard back, they set up a date and confirmed that it would work with my schedule. They flew me out, gave me a great hotel room, rental car and reimbursement for food. Despite the rental car, a bus was available on the morning of the interview to bring me to Microsoft's campus so I didn't have to worry about driving. The interview itself consisted of lunch, followed by 4 45-minute interviews. Between each interview was a 15 minute break to get snacks and drinks - this was extremely helpful in making this process easier. Afterwords, the recruiter informed me that I would hear back by the end of that week, and then actually got back even earlier than that - this was great as I didn't spend a long time waiting for a response like with other companies. Very well done interview process.