I bought an AllClear model 4000 and it worked so well that I wanted to try the model 2000 at my cottage and leave it up there. I've used it several times with excellent results. Any time we're out and the mosquitoes are out too I just place the mister in the yard and let it run for the three minutes, move it to another spot and run it again. It really depends a lot on which way the wind is carrying the spray. Sometimes if the wind is stronger and going a certain direction I will position the unit in a couple of places to get better coverage. Other days if the wind is light and variable the mist will blow in many directions. While no product I've ever tried gets rid of all the mosquitoes the Allclear mister works the best to get rid of mosquitoes better than any other product I've tried. Also the model 2000 seems to work just as good as the larger model.