Klax has experience with the Alien Generator from StarCluster 3, and asked him how they compare. He said the generator in SC3 was great at making physical details, but this one was fa better at integrating the physical with the cultural aspects. He felt he was creating sapients, not animals.
The more I have used this tool, the better I like it! It will probably be the default alien creation tool for StarCluster 4. :D