I've used these teeth whitening rods for several years and they are quite effective for home use. Following directions and using with the other products (There is a pre-rinse, whitening gel and toothpaste) consistently over several days (like before bedtime when you won't be eating or drinking anything afterward), you get a nice improvement in teeth whitening - and without the sensitivity often experienced with the "light" kits. It is a natural whitening and not a 'glow in the dark' brightening, so you look good!! The rinse, gel and paste can be used daily and are great for keeping teeth clean and bright....and I use the rods monthly...or before a special event! My dental checkups are very good!