I use this product mainly in the fall and winter months with that cold w/sinus issues set in from all the dry air I had been in take a toll on my sinuses. It works great for my terrible congestion, mainly chest congestion. Which is weird, because the box says nothing about being for chest congestion, must be a bonus for using this product. I recommend this product highly. Effectiveness I worked very well for congestion. It did not necessarily do anything for ,y other allergy issues, as this product was not specifically for allergies. I thought it was initially and was sorely disappointed when I discovered it was not. Ease of Use Nothing to taking this product. Just take them as directed, nothing complicated about this product. Immediacy I took a little time to actually feel the effects of this medication. So much time that I actually contemplating taking another dose because I did not think the first was working. I didn't do that, but I wanted too. After using this product for awhile, I soon realized the effects of this product was gradual and not designed to be rushed. I gave this product a 9 rating of how i felt once it began to take effect.