I use one more or less out of curiosity. I still use what they seem to like on that day. It is neat though to see what the selector chooses, and alot of times it will be real close to what they are hitting. And if the fishing is slow I will use it just to see if I'm way off on color or what! Its a neat little gadget to play with especially in deeper water, where it can sometimes show a dramatic change in light penetration. All in all I guess it works to a point, I just still have a confidence in certain colors no matter what.