Overall a good experience. They moved quickly despite having 5 interview rounds. Everyone I met was fairly friendly. My main critique was the lack of detailed feedback along with the rejection which I am still awaiting said feedback on where specifically I was not a fit after proceeding through 4 rounds of interviews with 5 people which I spent a signficant time preparing for. I feel they could have done better than a generic rejection reason ie "pursued other candidates that were more of a fit" etc. They were aware early on that I did not come from a cybersecurity background and assured me that would not be considered in any hiring decision. The hiring point-of-contact was very polite, friendly, communicative, and professional, I just wish that there was more detail as to why they arrived at the decision they did.
One other thing that I couldn't help but notice is that everyone I interviewed with was, well, not a person of color. I'm not saying that this had anything to do with their decision, but they could use more diversity at the management level.