The apartment that my new family and I had moved into since November was absolutely perfect. Just enough space for me, my boyfriend, and our new daughter. Nicely priced, quiet, wonderful neighborhood, great management, perfect amount of space, everything else that we could want. Then the summer began. At first, there were only a few spiders, which we had expected to happen upon anyway. Then we started killing five or six every day. Then the earwigs came, and the silverfish, and the centipedes, and the potato bugs, then the crickets, then the ants, then the beetles (of different sizes and variety). This isn't an exaggeration. I was literally sweeping up dead bugs from the kitchen every morning! It was like the kitchen floor was their playground at nighttime! We were appalled. The apartment felt dirty, no matter what cleaning I did. We also became worried when we found that some of the spider's webs that we had found were of funnel web spiders. It was then that we realized that our situation was a safety risk, since we have a 6 month baby crawling on the floor. A little pressed for money, and in need of a quick solution, I decided one night that I would purchase this. It was the only bottle on the shelf, it claimed that it would repel for three months, and it was the right price at the time, so I figured, "Why not? If it doesn't work, our situation won't be any worse than it is." A month after application, and there have been NO bugs. Yes, NONE! It's incredible! Our apartment is a paradise now, and I don't feel like my child might encounter bugs while she plays on the floor! I hope it lasts for as long as it claims, and if it doesn't, I still won't be disappointed. The bottle size was just enough to cover the entire perimeter of the apartment, so if you have a big place, you might need more. Other than that, we are extremely happy, especially for the price. Thank you ORTHO!