OO has essentially the same outlook as Reform – they don’t really care what the Torah, Chazal and Halacha have to say; they just want to do espouse whatever views are currently “in”, particularly about hot-button issues like same-sex marriage, feminism, humanism, being “green”, and what have you. Now, they often attempt (with little success) to shoehorn these beliefs into words that a respected Rabbi, somewhere, has once said. But by and large, they do not care what the majority opinion of the Poskim and Rabbonim are, nor do they necessarily care what the true intention of the Torah or Chazal are.
In short, regardless of what label one attaches to them, it seems to be pretty obvious that this movement has absolutely nothing to do with authentic Judaism.