the only thing that we are not pleased with is that exterminator didn't want to go in the attic to take out the yellow jacket nest first day sprayed was told within 4 hours yellow jackets would be all dead closed the door in room went back in the room following morning the yellow jacket were still flying around he came back the next day sprayed again and sprayed again next day 2 bees still hanging around I went to ace hardware I got a spray the next day there was no yellow jackets flying around so had the hole in ceiling fixed.