PowerA GameCube Controller
No offense, but I couldn't bring myself to buy one of those.
Despite the many qualities it may have, like being light on the hands (I'm not a fan of super heavy controllers), solid thumbstick which is not gonna need a replacement so soon, nice grip, long batery duration while the cable is detached, easy to clean, and so forth.
Those look like a little boy toy, even though this one you attached in your post is slightly better. I wish they got rid of the rainbow buttons, though.
Still looking like a toy, to me, so it's a no-no. Just my two cents.