This works.  I will order it again.  But I will anchor it better so it doesn't blow away.  I lost it in a wind storm.  It smells pretty bad, but it also works in the house.  I brought it indoors and set it in the bathtub when the flies were particularly obnoxious inside.  Opened the (screened) window in the bathroom, and they flocked to it in there.  I set it back outside after a while, when I could begin to smell it.  I wouldn't keep it in the house with windows closed, however.  Phew!!!