We tried everything else to rid our lawn of moles.  Smoke bombs, repellant, poison worms are useless.  This works.  A big plus is you get to see the expired varmints and say a few words before disposing of them.  Moles have a very good sense of smell and this trap had a strong paint smell when I got it.  I ran it under some hot water and that seemed to work.  Use gloves and don't forget to unhook the safety bail like I did once (and everyone else).  There are a number of instruction videos on YouTube I found helpful