I was taken through interviews with 9 people that extended throughout three months as well as an assignment. I know many companies these days like to bring in higher-level executives for most positions, but many of those who were part of this process were late to the interviews and it felt like they weren't prepared at all.
There wasn't great communication in between, and the whole process felt hypocritical to the point of the organization. If you're all about equity, consider assessing your interview process to make it more accessible for those who can't take that much time off work or commit to an unpaid assignment.