I completed three steps of the process:
1) a call with HR
2) a call with a Hiring Manager
3) a call with the Hiring Manager's leader
The third stage was one of the most appalling interactions of my entire career experience. Rude, unprofessional, arrogant, abrupt, non-tranparent, untrustworthy the list is endless.
I think, certain folks simply forget that they represent the brand/company culture at this "interviews"....