Bought two cases, based on the reviews and was disappointed in it’s effectiveness. I would recommend buying just one can and trying it out before buying a large quantity. I’ve had better luck with other fly baits.
I ordered from this website, as Amazon shipping wasn't available because of COVID. I guess its kind of hard to judge as flies weren't necesarily drawn to the spray. I found a few dead, but it often wasn't where I would spray . Used to fungus gnats and phlorid flies that came in with house plant. The one thing it did do was make me wake up stuffy and congested.