Reasonably priced, they show when they say they will and the yellow jackets are almost gone (they said that there may be some stragglers for up to two weeks and it hasn't been a week yet, but most of them are gone). The yellow jackets get into the bricks in our building and you can't hit the nest with spray so we call CJB.The last time they were out, the treatment lasted two years. I will use them again.