We had a flea infestation in our home, which was awful!! One of the techs came, was very personable, friendly, and knowledgeable of our problem. He sprayed the entire interior of our home, and the fleas seem to be gone, 1 month after spraying!! Note: we had our 2 dogs and 2 cats treated with flea control the week before we had Wolfpack come. The fleas were dead and gone almost immediately after spraying. We did start seeing a few fleas about 2-3 weeks after they sprayed. But it has now been about 1 week since we saw any fleas.