I ordered the NatureFresh bags and so far I have not noticed a difference. At the same time I was interested in ordering their shower filters. On 5 different occasions I requested test results so that I could corroborate their claims. Nothing back except that at one point they sent me an email of a company that apparently manufactures the shower filters and I never heard back from them either. So either they are incredibly inept in their customer service or they are misleading in their claims as they won't send test results. In either case, a terrible company to do business with.
Bottom Line: No, I would not recommend this to a friend