Just finished an interview with Amazon for SDE2.

4 interviews each one took one hour. No details due to NDA signed.

First was a pretty easy question, Leetcode easy, was able to code everything before the allotted time, answered all questions, I could see that the interviewer was pretty happy.
Second was Leetcode medium/hard, was able to code and explain the solution pretty quickly. Interviewer was pretty happy.
Third was the most challenging one, the task was easy but the requirement to do it in O(n) wasn't. Didn't finish everything at time. I'd say at least Leetcode medium/hard.
Fourth was system design, really a textbook question. Did average on this one.

Upd: rejected.