It was a group screener interview with three attorneys over coffee (as opposed to an on-campus interview -- they didn't get the yield out of OCI that they had hoped for) followed by a standard summer associate callback interview: a series of five 20-30 minute interviews in a row with partners and associates in different groups. The series of interviews was followed by dinner with a partner and two associates.

Lengthy and thorough. You go through several rounds of interviews and the last interview is over two hours with many attorneys. You also need to have excellent grades. I got to the interview stage through networking but ultimately didn’t make the cut because of my grades. I was not a top 10 student.