Works really well! Only catch is that all doors and windows must be closed in order for it to really control flies. Once all windows and doors are closed all flies are eliminated within minutes! Would def recommend to others. Sticky refills are too expensive!
When the product arrived, my first impression was "It is much bigger than I though it would be." I installed it out of line of sight of the door and plugged it in. Wow! 2 weeks later I had to change the glue pad. If you buy one of these get a couple of replacement packs. They work!
I've been using the light in my mudroom and haven't noticed any insects in my house this spring. I just checked the glue trap and was very pleasantly surprised. It's a lot of light but my wife doesn't mind. I ordered another package of glue traps.