These traps work very well.  I recommend checking a few YouTube videos for recommendations how to set them (wearing gloves is a good idea to keep your smell off them).  They do take a fair amount of hand strength to set but the supplied "forks" provide good leverage and I would think that the average adult man or woman can use them without problem.  The springs are heavy and strong so I wouldn't want to risk getting lighter duty brand traps in this design.  I have also used the straight up and down stabbing style traps and have had much better results from these Victor traps.