From my reserch, this is the best mole trap out there.  It does work for me but took lots of trial and error to figure out how to set it correctly.  I bought two, one worked perfectly, but one had too much powder coat on the trigger pan to release properly.  Don't be afraid to use pliers on it to adjust the release/ trigger pan lip to set the release force.  And make sure the legs pass each other when released, one leg was slightly bent striking the other on one. What I found works best for Pacific NW moles was to dig the trap hole just barely large enough for the trap.  No loose dirt on ends of trap.  Clear the mole tunnel of all loose dirt with a spoon and pack the bottom solid so he doesn't dig around in the soft dirt. I used sod to cover the trap with NO dirt back fill in the hole like the instructions say. Once I found a main tunnel to set it in, its deadly!