I bought the half-cupcakes a month ago. My hubby has a bad neck-he had a head on collision with a car in the early '80's whilst riding his motor bike. From the very very first time he strapped it to the back of his neck he began to notice a difference. The first morning after wearing it in bed, he found he was able to turn his head around more than before, without it hurting. After three or four days Andy could turn his head properly, instead of having to turn his whole body around! He is well pleased. Our water tastes better too, although we don't use the prills at the minute. My skin is better, smoother and 'cleaner', less oily, my enlarged pores have shrunk and just maybe, it is doing my wrinkles good too!? Crystal cupcakes work.