I had a 1 hr face to face interview with the VP of Engineering followed by two separate sessions which were about 1 week apart.
All interview sessions were coordinated directly by the Director of HR and mostly over email or text messages. On my first onsite interview, I was explained their business model and the technical merits of their solution.
The interviewers showed genuine interest in my candidacy and spent time listening to my experience. They were inquisitive on aspects of my experiences that aligned to their business and day to day work. I never felt rushed. No one was condescending.
Majority of my interviewers were experienced which is a good sign in a startup.