We have a large back yard that is surrounded by woods. The woods are only about  25 feet deep and then houses on the other side. "Asian tiger" Mosquitos attack us day and night. They are relentless. I bought a Burgess propane fogger which works but it only lasts so long. I put Dunks in our retention pond and they work great. This thing Kills bugs because I see them dead all over it. Does not seem to make a big difference though. We still have Mosquitos biting us day and night. I'm sure it helps but I'm not sure anything can kill them all. The "attractant" thing seems like a waste. I think the light is really what attracts them. However I think this is also why they never seem to all die. They just keep flowing toward the light. So the close ones die that night and others come closer and then settle wherever they are when the sun comes up. It seems to be of good quality for the money and it kills bugs. It did really even help my problem so I could not give 5 stars.