For APO, I'm sure it's a bit different for each chapter. For my school, it was really big and popular. We're talking about hundreds of people with big families and all of that. Just make sure you are committed to a few years in it. It takes up a lot of time and money to stay active. However, it would look nice if you took on a leadership role. I was only there during my freshman year and could no longer afford to pay all the fees and go to all the meetings, so I went on exploring other stuff. It's your decision.