Unnecessarily drawn-out. I had to undergo seven interviews in total, for a middle-management role, along with 2 written tests.
The interviews themselves were not difficult at all. The 5th to 7th ones with US management were positively chatty and very informal, so I guess these were more about fit & personality. They didn't ask me any tech questions.
However, there was radio silence from my last interview for a whole month. I had to follow-up with HR to enquire if I was still in the running or not.