I received a sample of this from my dentist because I have very sensitive teeth. My teeth were hurting from both cold and hot things I would eat. I started brushing twice a day with Sensodyne Toothpaste, and I noticed decreased sensitivity after a few weeks of using it. It didn't totally get rid of the sensitivity, but it made it much more tolerable. It recommends brushing for at least one minute, and I brush for two minutes. I was happy to have decreased sensitivity, but I was very unhappy with the flavor of this toothpaste. It is the worst tasting toothpaste I've ever tried! I actually started dreading brushing my teeth because of it. I also didn't like the way my mouth tasted after I finished brushing. It didn't really feel like my teeth were clean. After finishing the sample, I switched to another brand of sensitive toothpaste. I get the same results without the horrible taste.