Get a FREE Crest 3D White Whitestrips sample from Walmart. This product will be in stores early March and provides professional level whitening that whitens as well as $500 treatments. Satisfaction guaranteed and there is a money back guarantee! Check out the guarantee direct from their site:

“Crest Whitestrips provides you with a whiter smile – guaranteed. If you are not satisfied with your results, Crest Whitestrips will refund your purchase. Simply return your receipt and package UPC within 60 days of purchase. Limit to one refund per person. Call 1-800-208-0169 for more information.”