The final round had 4 interviews back-to-back testing algorithm questions.
If you do LeetCode mostly, you should be fine.
Try to practice because they will look at your speed and thought process as well. The experience also depends on the interviewer, but overall, not bad at all.
The following metrics were computed from 999 interview experiences for the Microsoft Software Engineer role in United States.
Microsoft's interview process for their Software Engineer roles in the United States is very selective, failing most engineers who go through it.
Candidates reported having very good feelings for Microsoft's Software Engineer interview process in United States.