I live on the coast in the southeast.  The mosquitoes have been eating me alive this year.  The city normally keeps them under fairly good control with spraying, but it has rained so much that the city has not been able to fly the helicopter to spray.  I did not expect for this device to really help that much, but I have been pleasantly surprised.  I have a small back yard with a drainage ditch behind my privacy fence.  The mosquitoes are not bad in my front yard, but they will eat you up in the back yard.  I placed this about 6 feet off the ground in a tree in front of my fence.  It is about 25 feet from my patio.  I attached the mosquito lure that was included to the bottom of the device & turned it on late afternoon.  I went out as usual the next morning to refill the bird feeders ( I am usually swarmed by mosquitoes) that are near my patio.  I was amazed that I did not see even one mosquito.  Later that evening I did see 2 mosquitoes, but considering that I would normally be swarmed by at least 10 to 20 it was a great reduction in numbers!  I bought the next larger size than I needed as my back yard is less than 1/2 acre.  I bought the 1 acre size to make sure that it was effective enough to kill the astronomical number of mosquitoes that have been feasting upon me daily (also my poor dogs). The little suckers have been decimated apparently!  I leave it on all the time as the mosquitoes swarm here all day long.  I now have control of my back yard again!!!  I discovered that a long bird feeder brush cleaner works perfect to clean the housing.  The long bristle end will fit through the slats & it brushes off all the dried bugs & debris.