The creams that I have (in between white and yellow) are incredibly stable and if it had just a pinch more glide would be the most perfect fairway driver I have ever thrown. It is easily my favorite driver right now. Of course I need to wait until the summer to make sure of this, because summer air has a tendency to knock out a little stability, but right now my Rivals are dead straight, just aim and throw.
I would not say that it has drastically changed my game. In reality it is not knocking any throws off my low score, but with it being crazy straight and easy to throw at near full power, it is setting up some really easy second shots and more tap in birdies. I think it is perfectly capable of knocking one throw off my average.