I am so excited to leave our review on this product!!! Never in the history of rodent poison have we had such truly outstanding results!!! This poison has put a permanent smile on my husband's face... Now, when you mention mice, rats, or any other dirty home invading rodent, my husband actually laughs out loud and dares them to set foot in our house!! He is so cocky now!! Before this, he used to get so angry about mice in the house that he couldn't even sleep at night.At first when I was thinking about buying this, I was worried about the price tag, because it's a lot of money to shell out for a product that I wasn't sure if it worked or not. But then I thought about how much we have spent over the years on buckets of the green block rat poison... the stuff that you have to reorder every month because it never gets them all. I also looked at how much you actually get (16 pounds, separated into 4 bags) and realized that it is VERY well priced. So I ordered it....Well let me tell you, we have NEVER seen mice disappear so fast. I gave a bag to my husband and one to my dad, and they both put it out in their houses (both houses were FULL of mice at night). Within ONE DAY, the mice started acting like they had forgotten what time of day it was and would just walk out into the middle of the room, lost. There were mice that started looking disheveled and tired, with their hair sticking straight out like fuzzy pom poms because they stopped grooming... and their sprint turned into more of a slow-motion hop. They would just stand there in broad daylight as if they swore they had become invisible. "This is a good safe place to stay, I'm hidden!" ... meanwhile the mouse is sitting in the middle of the living room floor with six people staring right at it, screaming. It was surreal!Within three days, both houses had become dead silent. No more munching, crunching, scurrying, rustling, squeaking, or any other mouse noises. Not even any baby mice wandering around looking for their mother! Dead, all of them. Absolutely NO mouse activity for the past MONTH. I will certainly write back and let you know when, if ever, they do come back.... but if they do, we have quite a lot of it ready to go! We still have two half-bags that we opened, and two more full bags. This poison is as KICK-A** as they come. If you have even one mouse, or if you have thousands of mice... buy this. It WILL solve your problem.I am NEVER wasting my time or money on another product again.********UPDATE********One mouse appeared in our house, and one mouse appeared in my dad's house, a little over a month after using this poison for the first time. Just one! We placed the poison again, and it did the trick immediately. It has now been six months, and there has been absolutely NO mouse activity whatsoever in either house. We have not put any additional poison out since the little bit to kill the stragglers that showed up. This stuff works like nothing else on the market... they have stayed gone! WOW!We found out several months ago that my son has a pretty bad allergy to mouse urine (the pediatrician said that it is a very unusual allergy and was reluctant to even run the test for it because she thought it would come back negative), so needless to say, he has been enjoying the absence of mice ever since we purchased First Strike. It has been a Godsend.