I've passed a good few of these interviews. The other advice is good. I just wanted to add that the thing that always gets me is that by the 4th or 5th hour i

I've passed a good few of these interviews. The other advice is good. I just wanted to add that the thing that always gets me is that by the 4th or 5th hour in the on site interview, I start getting tired and start slipping up. You don't really often get a great break in the process. The jet lag from flying to the onsite is also a killer.