Was referred by a friend and total process (initial contact with recruiter, writing task/questionnaire, phone screen with member of Studios legal team, on-site interview) was around 3 weeks. Overall, I was very satisfied with my experience. There were some communication issues with the onsite interview itself (I wasn't notified of some last-minute changes that were made to my rotation of interviewers), but otherwise I appreciated the transparency about the role and office culture at every step of the way from every person that I met with. During on-site interview, I met with 4 people from the team I was applying go work with + 1 person from the Seattle office (meant to be a third-party evaluator/"bar-raiser") over the course of around 4 hours, so it does get tiring by the end, especially since the questions they ask get kind of repetitive. Nonetheless, it is definitely really important to closely study the company Leadership Principles and to come prepared with a handful of solid anecdotes to which you can apply the principles. Also come with lots of questions for your interviewers. The recruiter I worked with was super helpful in letting me know exactly what to expect and how to best prep for my "loop," so definitely make sure to use your recruiter as a resource.
Ultimately it was determined that the specific role would not be the best fit, but I had great conversations with the Studios legal team, which genuinely seems like a great team to work with, and was told by the recruiter that they would pass along my info internally and keep me in mind for future openings (which definitely softened the rejection ha). I went in with some qualms about Amazon as a company, most of which I still have and also why I wasn't super bummed about not getting an offer, but the Studios office specifically seems like it would be a great place to work, and if nothing else a great place to have the opportunity to interview with.