The interview process is very personal, they really try to get to know you as an individual, your history, your likes, and your own ideas. My first interview was a little over an hour long, but in that time I was able to learn more about the position I was going for, and OGP as a whole. You also have a test day if everything proceeds, and you get a set of assignments to do within a time frame to see how you do. It's a good way to see if this is really a job that you want, and if you can picture yourself working there for a while. I appreciated that. It's definitely a lengthy interview process but it's worth it!