I bought two packs (70 pieces in each pack) and a neckbrace when I was in Hawaii a few weeks ago. The sales said it is getting very popular in HK. It also comes in tapes too. I saw many Japanese runners had them on their thighs and legs while running. So far not showing any difference on me, may be just a gimmick only.
But take a look at their USA website, many professional ball players are using it.