The process went very smoothly. The entire process took about 6-7 weeks. I applied through my school and was invited to participate in two on-campus interviews. From there, I was invited to a final round where I went to SEI's headquarters for another two interviews.
In terms of the questions that were asked, they were not technical. But that is because I could tell the interviewers were looking for intangible traits that they thought you make you a good fit, not whether or not I can properly explain what convexity is or pitch a stock.
The interviewers were some of the best, if not the best interviewers I have ever had. Loved the entire experience.