I have been using the Raid Fumigator regularly for 18 years when I was in college. I rented an apartment that had a flea infestation and tried to kill them with multiple products, only to find out about the 3 stages of the flea life cycle. I finally splurged and bought this Raid Fumigator. It took care of the problem and like others mentioned, I found dead spiders and other bugs. I love that it is deep penetrating and residue free. In reading some of the negative reviews, I wonder if people are using the appropriate number of cans. A can of this stuff only covers a certain volume. After this product's initial defeat of the fleas, I have used it in all my subsequent apartments and homes, even under one of my homes in the crawl space. I live in Southeast Georgia now, where there are numerous bugs, and I use this product twice a year to keep my home bug free. It is a little pricey, and instead of being away 3 hours, I found that it is best if you stay out of the home for at least 4 hours. It is good to disconnect your smoke alarms or they will go off, and you don't want to go back in to disconnect them. Again, you must use enough of the product to saturate the volume of the room or house. I have a 1900 sq ft home, so I use 6 cans, and if I see a bug in a room, the next time that I bomb, I isolate that room with a can and shut the door. Ants can be tricky, using the fumigator kills the inside bugs, and I have used granules sprinkled around the entire perimeter of the house and in the yard and this usually kills the ants.