Let me tell you my personal experience based on this topic; Cockroaches last week were all over the kitchen area. After the lights were off for a while at night, I would turn them on and there were about a few more roaches all around the kitchen counter. We weren't even messy, the place was always clean and we cleaned the counters and stove after cooking food. I put little spots of the gel along the corners of the surfaces and in areas where they could get into the kitchen. Immediately I saw that some cockroaches were interested in it and began consuming it. This got me excited. Over the next couple days, we would find a few cockroaches stumbling around the floor both day and night. And then we stopped seeing them. It's been about a month and I haven't spotted one cockroach since. You can actually trust these reviews because it really does work.