Purchased the LZR UltraBright in May, over two months ago. I had a severe case of sciatica on my right side. It was very painful and debilitating. Within several days of using the LZR, I started feeling some relief. Now , 2 months later, I am almost pain free, but still cautious in my activities. The LZR has had a very positive effect on my overall well being. I wholeheartedly recommend this product.