I love this, it makes a huge difference in my yard.  There was a distinct difference after only two nights of using this.  Been using it now for several months.  If I forget to turn it on, within two days I can tell the difference.  I used to not be able to walk on one side of my house without getting attacked, day, morning or afternoon- I would get attacked.  Now, I can safely and easily walk around me yard.  DON'T listen to anyone who tells you scientifically this doesn't work, it works!!