Lengthy and disorganized. The original HR rep left the company during the process and their work wasn't handed to their replacement so several weeks went by before they even realized what was happening.
The process involved an initial call with the hiring manager which was simple enough.
After that, I met with the team in a kind of "coffee chat" call.
There was a third round where they asked me to present on a data related topic.
Total time commitment as an applicant was probably 3 hours.
Zero compensation for that time.