You try it and if you cant both see and feel a difference, then dont bother to change ... BUT I dont know a single good technician who cant both see and feel a positive difference between the two. Having said that, to make the product sing for you, you need to do a conversion class which is free at distributor locations and all you pay for is the larger kit that has everything you need and will pay you back handsomely. CND is different and the class will teach you how to use it for the benefit of your business.