I have actually purchased my second bag for future use. I have two rental homes and want to be sure that my tenants keep this bait and poison updated every six months so they never experience a roach issue again. They have confirmed the roaches are pretty well gone or they may see one a month. I, too, had the little buggers very badly in my kitchen after a remodel that obviously gave access that wasn't there before. I put these prefilled bait trays in six places in the kitchen and yes, the roaches disappeared after 10 days. Immediately, I saw them diminish but gone completely now. I had to move the counter top one more time before permanently securing it and a couple of roaches were present under the cabinets but that just proves, they will not come into the kitchen where they were in the past throwing grand parties for all to see. These baits keep the bugs off our counters and interior walls. I hope to keep them on the extinction list.