These were the first mole traps I ever used, but I have heard so many bad things about the older spike on top style so I ended up trying these.  It took a little trial and error to figure out the placement and stepping down on the tunnels in just the right spots, but after that these things paid off very quickly.  Set the trap, dead mole the next day, repeat.  Once I even caught a mole within 5 minutes of placement.  It seems these killed quickly - the jaws snap with a huge amount of force.