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.
This is a good product and easy to use. I have been using neti pots for a long time and a recent sinus infection prompted me to look for something that would hold more solution and be easy to use. When I used this one for the first time I found it had a little bit of "push" and irrigated/flushed my poor old sinuses easily and quickly. I am not sure how long the bottle will last as it isn't very robust, just a bit thicker than a normal soda bottle. That said, if I am careful with it I am sure it will last a fair while!