Been on a little bit of a gas giant making binge...courtesy of gaseous-giganticus. I have found that one of the tricks to using it is to stop the process early in for more realistic-looking turbulence/clouds/whorls, etc. One might need to do a little post processing in GIMP or Photo$hop, but in truth, it is a small amount. I find the increase of very drab, almost colorless gas giants I've seen very...perplexing. But, that's just my aesthetic preference.
Enjoy.
-M-