Here are the findings! The Fang control pad is bigger than I expected from the pictures online, but that's okay. It doesn't work with my Mac at all out of the box, ControllerMate is required to program it.
ControllerMate has a learning curve. For example some buttons are defaulted to weird settings and need to have the defaults disabled. Then you have to program them with ControllerMate. It took a while to figure it out, but after reading through the quality Help guide, it's pretty easy to do.
I wanted this for World of Warcraft, and so far I'm very pleased. My Warrior's abilities are all much closer to the movement keys than before, and I've got easy-to-hit buttons to change stances. Very cool! The pad is comfortable and easy to use once programmed properly.