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Awesome! I very pleased with this product, I’m a smoker so breathing can be a little difficult I did my full research on this product and when it said it helps with smokers I was sold I’ve been using it for 3 days and I already feel a huge difference, but the biggest differences is I wake up so clear now and I’ve wanted to get that fixed forever ! I’m so happy with this product and I’m so appreciative with amazon they always find a quick solution for any problem you have.