The Tree of Life Christmas projection shows were very good. They were quite short, but they play back to back with very short intermissions, so length isn't really much of an issue. If you're in AK for the Holidays, I would highly recommend you stay to see the Tree of Life shows. And after watching the Rivers of Light show for the first time immediately preceeding this, what an upgrade the Tree of Life show is. Rivers of Light is soooo bad, it has to be one of the worst night shows ever in a major theme park.