I have the base game of this and am looking forward to the expansion. As evolution themed games go, it captures the feeling of an authentic ecology nicely.

In general, I like evolution themed games this for the most part beats them all by putting a lot of the nice combos from Ursuppe and the ebb and flow of ecologies from Evo and the boom/bust quality from Evo and American Megafauna in a reasonable length game.

The fun combos, like the symbiotic scavengers on the titanic armored herd creatures are very evocative and it looks like the expansion ads some nice dynamics.