Spoke with hr who put me forward for a Phone interview with 2 hiring managers from pall. After passing the phone interview I was asked to come in for a personal interview a week later. The questions they asked were fair and the people were friendly. There was a hypothetical experiment they ask you to optimise - I think to show you are able to understand stats and control variables. They never bothered to get back to me though so I assume I didn't get the job. Soured the experience for me. Everything else was nice.