We have been using Bulwark for about 7 years. We live on a hillside in Fountain Hills and have a tremendous scorpion problem. The Bulwark treatments have pretty much kept the scorpions under control. We still find 1 or 2 in our house every month, but they are nearly dead as a result of having passed through the chemical barrier before entering our home. Our techinician, Dustin, is very professional and makes every effort to treat our home in a manner that gives us a lethal barrier to any pests that want to come inside.