I had problems communicating with their office and couldn't get a firm appointment time; otherwise the rating would have been higher. Fortunately, their guy arrived when we were home. He had a powered portable spray unit that evenly applied an insecticide mist to shrubs in front and back yards (approx. .8 acres). We had been plagued with mosquitos nipping us on our back patio. The treatment really worked and is still working a month later.