I almost played a Battle Dancer, but the DM disallowedeverything but the feats & weapons from DCv1: he wanted PHB only classes & races.
I've gotten my hands on a copy.
It IS like Christmas.
If I ever use any of this material, I'll post an update.
If you were REALLY worried about imbalance, you'd have to ban core.I tend to not allow this book on the basis that I never allow Dragon Magazine, too much is just unbalanced and poorly thought out.