The best way to describe the culture at ISI is "INTENSE" - everyone there is intense. I've never walked into more unwelcoming environment in my life. After a 7+ hour day of interviews, I walked out of there thinking "Oh, hell no! I would not work for these people if they offered me $1M a quarter!" And they called me back for more interviews with upper management a few days later. I told their recruiter "No thanks." He told me I was "crazy" - "This company is great, the culture is intense but we are making money!" I want to work with a team that is professional and successful, not "INTENSE". If you like "INTENSE" and no personal life, ISI is the place for you.