This stuff is amazing!!! NOT!!! It doesn't seem to stink enough to attract any flies. I have it down low out in the sun and the flies are buzzin all around. I used one pack of the bait that was included and 2 extra that I bout from a 3 pack of the same bait. I've used the bag ones or the smaller ones and they work great. This was a big bust and now I can't even return it!!!