For the past several years I had been unable to sit on my back deck due to mosquitos what would "attack" my arms and legs. I called Mosquito and their customer service was wonderful. I decided to give them a chance and it has been a true blessing for my family and me. We bbq all the time, and sit and eat without slapping away mosquitos from our arms and legs. We host dinner parties outside and feel relaxed and confident that our guests will not be disturbed by these nuisance bugs. By the way, it does not appear to have affected the many butterflies that love to feed off of my many flowers. I see bees also so they have not been adversely affected either. I would definitely recommend Mosquito Joe!!