Anyone use an electronic "Lure Color Selector"?  My fishing partner wants to get one but im not sure i its worth the $100 plus dollars he wants to spend.  Do any of you guys use these and are they really worth the effort?

No.

NO!

Roland said it was necessary, so you guys that say no must be crazy :

Yes, and it does give you suggestions as to the color to use.

I have seen a guy use it and after checking the water he went on to catch three bass.

Go figure?  

Save your money.

If I remember right those things are just more or less a light meter.

I'll sell him some magic fishing seeds. Just toss a few in the water...... :

he would be better off using that money to buy a large array of crank baits in various colors that he can use in different conditions and just see what is working that day. No machine is going to be able to tell you what the fish are looking for, only the fish can tell you.

The therory behind that unit is that it will tell you what color the fish can SEE the best. Not what they will hit.