I had to hire an exterminator several years ago. I interviewed about 5 companies. I hired the ONE person who owns his company and does all of the work himself. All the others just sent sales reps, who will promise you miracles they cannot deliver. I had several main concerns: were the chemicals used safe for both humans and animals? How effective will it be? The guy I hired only used diatomaceious earth inside my home, which is entirely safe for all creatures except ants, and ants in my home were the problem. He used a bait and a poison outside, which is typical for most companies. Using DE is a bit unusual, but it sure worked. Within 2 weeks I had NO ants inside. I've had to call him back several times because ants of course don't chat amongst themselves to say "avoid THAT home, she kills ants." LOL! But I also bought DE and have used it both inside and outside my home. I don't like to use poisons inside.