Wow! I waited a few weeks to write this review as I wanted to be sure of what I was finding. I put the tumbled stones in our office (they entire set is very beautiful)- without my husband's knowledge. We both work from home on our computers and in the last year+ it has been almost impossible for my husband to make it through the day without feeling ill and needing to nap. Since day 2 of having the shungite in our office he has not napped and has complained much less of feeling ill. As he does not know about the shungite, I know that he is not giving me a false reaction based on hope. I have also noticed that I am not as weary and nervous during the day. I would say that this is a must for anyone that wants protection from EMF's. Also, Val is an amazing person - very kind and helpful. Yes, this product is absolutely worth it!