To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Easy to use. My sinuses are so much clearer - would not have thought it would make such a difference. My wife is happy because I'm not snoring and my mouth breathing during the day is non existent too. I'm a musician and my singing tone has improved as well. Recommend this to anyone and everyone!