I would strongly suggest you to not interview with this company! My experience was extremely similar to negatively rated comments.
I was contacted by a recruitment person and then I had a call with someone from the team. It was a very simple and basic interview. By the end of the interview, interviewer told me that she/he thought I'd be a great fit. She/he even talked about the written assessment in detail as part of next steps and said that once I get the assessment I will be expected to finish it within a week but if my schedule does not allow this, I can always write to the team. When I mentioned that I might be in Bay Area in near future, she/he told me that I should let her/him know and maybe I can even visit the office.
A few days later, I got an e-mail with 2 sentences from a generic e-mail address stating that they will no longer proceed with me. I'd recommend anyone to reject C3.AI invites immediately as to use their own personal time most effectively.