Great interview process, start to finish. 3-stage interview; initial "informal" interview, followed by an interview with director of the department, culminating with a case study presenting on a relevant topic to a panel of 3-4 interviewees. The interviewers are all clearly passionate about the company and product, knowledgeable in their respective fields, and will ask you relevant and engaging questions. The best interview process I've ever been part of, and I've been through quite a few of those.