Woohoo. A successful launch. I was so anxious. I had a lot of confidence in the SpaceX team and even in Elon Musk individually. But Elon himself put the expected success rate somewhere "between 50 percent and 70 percent."
I do love his attitude though. He said it would either be an exciting success or an exciting failure. It is rare to see someone so gleefully embrace his own failures. I think a lot of lessons can be learned from that attitude alone.