Really long interview process, in the beginning they were very responsive and eager, I had 4 interviews over the course of 2 months, including a project and presentation that I prepared. I thought that was the whole process, but they asked to schedule 3 more interviews after that, saying that it was more of a "vibe check" than anything. I had scheduled all 3, had one of them, a brief call with an executive who didn't seem very engaged. After that I received a brief email saying they were passing on me and were cancelling my other scheduled interviews. I responded, saying I was surprised and asking for feedback and received none.