As others stated, if used correctly in a good location, you will get more moles with this than any other trap I have seen.  It is tough and effective.  Be very careful setting it, the spring is very strong.  Also, after setting, I like to sit a coffee can over the top of it so dogs and cats do not mess with it.  After you figure out how to use it, it is very effective.  The pros use this trap for a couple reasons: