I bought this product to help with my itchy scalp that was not controlled by anything else and I LOVE IT!!

I've been bleaching my teeth for about 10 years. I've tried several different whitening products and I like Nite White ACP (formally Nite White Excel) the best. It works quickly and effectively with little or no sensitivity. The instructions recommend leaving the trays in for an hour, which is just about when my teeth started to get sensitive - they were slightly sensitive throughout the next day. This product does not inflame my gums like other products. If you have very sensitive teeth, I recommend a lower percentage. The product arrived quickly via USPS. My only complaint is that at $7, shipping is too pricey.