I bought a couple of these traps to compare to the Mice Cube that I bought at the same time. I had used a sticky trap to catch a mouse, and my kids (animal lovers) were mortified. I had to switch to humane traps, and this and the Mice Cube looked to be my best bet. The first of these traps that I opened had a broken plastic pin that kept it from opening. It's on its way back to Amazon for a replacement. I set the second trap with a dime sized spot of peanut butter in its bait tray, and placed it along a wall between two rooms that I've seen a mouse in. At the same time I placed two Mice Cubes in the same area. In the morning I noticed the door on the Kness Tip-Trap was closed. I could not feel anything moving inside, so I thought someone had bumped it. I carried it outside to an open field down the street, removed the rear cap, and a healthy brown mouse scampered out into the field. Success! I set it a second time and put the trap in the garage. 24 hours later I saw it tripped again, and using the same procedure I released a baby mouse into the field. Nothing touched my Mice Cubes that were in the same areas.