Have had this up for about two weeks and it has done a fantastic job of sweeping the sky of pesky bloodsuckers!  I have about an acre which backs up to a large wooded area with creek and pond, and in the past as the weather warms up the pests begin to emerge.  This year decided to take proactive action and hung this up about the time the bugs get started.  After a couple of days, you could tell the difference.  Now in the evening you can sit out and have very few problems.  You must set it up per the instructions about 25' away from your sitting area to get the greatest results.