Helpful
I used it 2x/day every day for 4 weeks before reviewing. The effects are subtle, not spectacular, so it won’t replace all the things I do to try to keep my head open, but I am glad to be able to add this to my arsenal, and it is helping a bit with sinus-related migraines. It did start making a bigger difference after I’d used it daily for about a week and a half. So my advice is to be diligent and give it time, and overall I am pleased and will continue using it. As long as it lasts a long time (some reviewers are finding that it stops holding a charge too soon after purchase), then I think it will be worth the $149 purchase price.