I went in for a first round interview and it was overall a very pleasant experience. My interviewer was personable and engaged. I followed up a few days after the interview at which they told me they had decided not to move forward with the interview process.

Haven't had yet the interview (this is my first time looking for a job in the US) but can tell you that after they select your Resume, they send you a case for you to solve in app a week. The case I receive was about identifying problems and finding solutions for reducing the therapy drop out rate in an hypothetical situation in a public hospital (diabetes patients). I was very fun but took my a while. I had to do data analysis but was relatively simple (obtain p-values).