I'm currently using this product along with Demand CS and while I'm almost 100% sure the demand CS works wonders, I think this stuff works pretty well too. I put this product in the "wet" areas of my house... Behind toilets, under sinks and that is where I have seen silverfish stopped in their tracks, dead. Hallelujah! Have also found three small palmetto bugs dead in the bathrooms, so seems to work well on them too!