Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unbelieveable

I was very skeptical about purchasing this product but decided I had tried almost everything to clear my sinuses, so why not try this. It works, it really works and I am thrilled with it. I had heard many years ago about a pot filled with salt water to clear the sinus but I had never seen one nor did I know where to purchase one. Highly recommend it!!