Although I didn't ultimately receive an offer at Kin, the recruitment and interview process there was one of the more streamlined and thoughtful processes I've undergone in my job search. It was three parts (HR screener, 1:1 meeting with hiring manager, homework and panel discussion) and took a little less two weeks, all told. They were pretty flexible with scheduling.
I applied online and was contacted by their recruiter a couple weeks later. Standard phone screen. He was relatively knowledgeable about product management considering it wasn't his field. My interview with the product director was set up the next day: standard behavioral and scenario-based questions; he also asked me some basic SQL questions which anyone with an intermediate grasp of SQL should be able to answer. The prod director was very sharp but very personable. One thing I really appreciated is he told me in the meeting that he was advancing me to the next round. This is the sort of emotional intelligence you think would be standard in the world, but unfortunately isn't lol.
The homework assignment was a broadly outlined strategy proposal which I then presented to a panel consisting of the hiring manager, a marketing director, and a research director. Obviously, this was probably the most difficult part, as they had all read my proposal and come up with some gotcha questions. But they were all super professional, welcoming, bright people and it was overall a good meeting.
When I didn't get the job, the recruiter called to let me know and gave me some feedback. I appreciated the humanity in this, as I've heard of other organizations putting people through five or six rounds of interviews only to reject them with an automated email.
Like I said, overall a great process at what seems like a solid company. Good luck!