5 interview rounds, process was just over a month.
1st - HR screening call - 30 mins
2nd - CCO - 1 hour
3rd - Director of Operations
4th - Director of CS
5th - Panel interview in which you are tasked with presenting a deck to CCO, Dir CS, VP of Product and Customer Enablement Leader - 1 hour
I found every interview pleasant and everyone was very nice. I admit to being frustrated in not getting an offer given what I brought to the final interview including a week of prepping, pouring all the years of skill and knowledge I had acquired in doing exactly what they were asking for. They even asked for a copy of the deck, which I sent. I had all the indications that this was a perfect fit, especially with how well each stage went. I do not think of myself as more than I am, however most know a slam dunk when it happens. I got the feeling they had already hired or perhaps decided to not hire and solve internally by the time I got to the final round and were interested in ideas, which I willing gave a successful strategy for. I suppose I wouldn't need me either the plan and major touch points for execution were easily provided. Can I knock that creative use of interviewing to solve a problem without needing to hire said person? I suppose that boils down to ethics or me believing I am more than I am. No way to ever know. :)
Overall, outside of the time invested to not yield an offer naturally frustrating me - the experience was very positive.