Received the call today right before noon EST from a Cambridge number. Was quite shaky and surprised since it was a week earlier than the school's announced decision deadline. To give clarity for other waitlisted students, I submitted 3 letters total: 1 from a former manager who completed her MBA in Cambridge (so I went for the why Boston angle), 1 from an alum, 1 from myself outlining a professional update + reasons why Sloan + how it all ties to what I can do for Sloan and what it can do for me. I believe these letters were absolutely crucial to convert the waitlist over to an acceptance. I did not visit campus nor did I attend virtual events.