This thing rocks! I live on a lake and the bugs are horrible at night- they coat my windows trying to get in at the light and opening a door lets in a disgusting tidal wave of various creatures that die overnight and cover my tables and counter tops.  However when this baby is running, almost no bugs show up on the windows, even around the corner without a direct line of sight! There is a non-stop (literally) crackle coming from around the corner with bugs meeting their end by the thousands when I have this running at night. Tip: if you have the volume of bugs I'm talking about, don't place it near an open window.  The burning insect smell is not pleasant.  Money will spent.  I've even brought it inside to get rid of the above-mentioned tidal wave on a few occasions. I will note that mosquitoes still like people more than the light if I'm out on the deck. I did not really buy it for mosquitoes however and I have not tried using the included mosquito attractant so I can't fairly judge it there.