Brief and concise. It was ok, never a dull moment. There are levels that you need to go through. It really depends on the position that you are applying for.
I applied online. I interviewed at WTW (Seattle, WA) in Jul 2018
Interview
You are asked to submit a HireVu interview - basically you record yourself answering several questions. If you pass they set up 2 phone screens back to back, followed by an onsite the next day. You do not get to meet with anyone from HR, only your potential coworkers.