I had first an initial phone screening with a recruiter. Then I had a phone interview with the hiring manager after which I was asked to do a written exercise where you need to answer one of the standard Amazon questions. The objective is to see if you can write in a structured way, i.e. in the STAR format.
And then I was invited to 4 face to face interviews. The people who interviewed me were all very nice. But in my opinion, the problem with the Amazon interviews is, that they are 1) very strict with the STAR format and 2) don't care about competency.
To 1) I didn't get the job probably because I didn't put my answers into the STAR format, i.e. Amazon told me they felt I wasn't structured enough. Amazon wants to see how structured you are. But this feels entirely unnatural to me, to press every answer into ONE format. If I have to answer everything in the same format, I start feeling like a stupid robot. After my experience, I'm actually surprised about how successful Amazon is, because this process seems to cancel out all emotions and the chaos of creativity. That's just my opinion.
To 2) I was definitely more than qualified for this job. But again, Amazon seems to care only if you can put your answers into the STAR format, like a robot. They don't seem to care much about whether or not you're actually qualified for the job. This can be a really frustrating experience.
In addition: Amazon has a fixed set of questions they will ask you, which are based on their leadership principles. This means that there's not even room to ask any questions based on your competence. To me, this doesn't make sense.
However, the process itself was very smooth and quick.