Man, that brings back memories. When I was in Jr. High (late 60s) I was very involved in your church youth group, and I went to hear one of the founders, Nicky Cruz, speak. He has a pretty inspiring story, Run, Baby, Run. He's still around, though he's in his 70s now.
As far as I know, they're a pretty legit group with no scandals I ever heard of (and these types of organizations are, unfortunately, sometimes prone to those).