They sprayed once as part of the Angie's list deal. This really did cut down on the number of mosquitos. After they sprayed for the 2nd time (charging another $70), there were still a couple mosquitos. They came and sprayed again, but still mosquitos, so they came a 4th time. We still have a few mosquitos in our yard, so will not be continuing their service. They say that they will come within 48 hours of being reported, but when we called on Friday at 5:00 PM reporting a mosquito, they did not come until the next Tuesday. They don't offer any refund for the days they leave you with mosquitos in your yard. I think it helps, but it's not worth nearly $100/month if my family is still being bitten (stung) by mosquitos.