Earthing/Grounding Sheet.

Hi. My 2nd question for today. Has anyone tried the above yet? I've heard good things about them and today I've discovered that my granddaughter, age 11, has one and is sleeping tons better than before. She was always waking up through the night and so my daughter was kept awake too, but no more a problem. I've heard that people experience less pain in joints etc. and feel much better because they are sleeping so much better. It might be worth looking it up if you're suffering? I'm thinking of ordering one but not sure yet. Tempted.