Two rounds after HR phone screen. The whole process took ~7 weeks.
1st round was 45min of behavioral, which was great. 2nd/final round was a large take-home case/assignment and to give an 30min virtual panel presentation + 30min Q&A, plus a bonus round of behavioral.
Would have rated 'positive' overall experience, except during final round HR messed up twice (failed to show up for tech setup/cameras etc; gave me wrong names for behavioral round).
Rated 'difficult' mostly because of how demanding the taking case was.