Everyone was skeptical and even teased me when they saw me putting together this trap.. however, the jokes on them!!! It has been up for 2 weeks and we already have a bunch of flies in the trap (200ish?). Our pool is about 15 yards from a marshy area in our yard and last year flies made it nearly impossible to enjoy swimming without everyone being bitten. It was absolutely absolutely miserable! I got so bad that my dad, who has a bald head, had to wear a hat in order to swim in the pool. I was concerned that we weren’t going to be able to have people over and enjoy swimming because of all the bites! Fast forward to this week.. we had one pesky fly that was trying to get at us in the pool, otherwise, NOTHING!! I have a feeling when I put my citronella torches back up, the results will be even better. I am so thankful for this product and I’m really glad it is working so well since I had to convince my spouse that the investment would be worth it!