Finished both interviews as well.
They both lasted a bit more than 1h. I received immediate positive feedback from the first interviewer. The second interviewer was very friendly but did not say whether he would (or would not) recommend me. When rethinking about the interview, I remember some good things that I said but I also remember stupid things... really don't know how it will end up.
Other question, I see on insead's website that the deadline for round 2 is today. Do you think that they compare round 2 applicants with round 1 applicants about whom they hesitate ?