The unfortunate part is that I waited over 4 weeks to hear back after the on-site interview, when they repeatedly said it would take around one week. Obviously there are delays sometimes, but four weeks seems egregious and I had to check in multiple times. I was only notified after I informed them of an impending offer deadline. The decision process was opaque. The recruiters had said multiple times that we (the candidates) were "competing against ourselves" and that there was a spot for everyone there. This seems untrue, for many reasons but especially because it took so long to get feedback. Maybe I shouldn't have taken that claim at face value, but I would argue that it shouldn't be said if it's not the case. There could have been another reason, but my recruiter didn't look into it. When I finally heard back there was no feedback, just a rejection, which is fine but adds to the non-transparency of the process. Had an on-campus interview for 30 minutes with basic resume stuff, one quick coding question, and time to ask the interviewer questions. Waited two weeks and then scheduled an on-site interview in Redmond, which was four 45-minute interviews. Interviewers seemed more interested in how you approach the problem than finding the most optimal solution. All were very friendly and were team leads who had been at Microsoft 10+ years.