I picked up something very similar if not the same at Neptune a couple weeks back. It is doing extremely well in my tank, the polyp's extend out further than SPS I have seen. If no one else wants it, I'll grow it out. I've noticed that where it gets direct bright light it turns green and the indirect more shaded areas are a very feint yellow.
EDIT
Wrong picture
If no one else wants it I would love to grow it out for DBTC.