All my life I've been a mosquito magnet. It really sucks. I bought a house that regularly gets mosquitos in the backyard and I'm in my own personal itchy hell when they come out. I bought this just to try it and OMG its the only things that has ever given me any relief. I'd say it works 98% of the time. I love this thing. I lost it and bought another one. I never want to live without it ever again.