Well, this thing is made like a tank and seems to work IF (like many things) you know what you're doing. Unfortunately, at least the moles at my house in Oregon don't make these nice, straight tunnels fairly close to the surrface like I see on so many tutorial videos. Mine run deep tunnels, and pop up to push out dirt. So, to make these work, I have to dig out a fairly large hole in the ground (think 8" x 8" at least) and try to locate the tunnel that's running horizontally. Many times I can't even find it, so I have to keep trying. Once I do find a tunnel down there, I do just like they say, build the mound between the tunnels, set this thing in there, and then I basically cover it back up with loose dirt and the piece of ground I cut out. Sometimes the trap sits there for days and days with nothing, and other times I've caught a mole in 1 day. I've caught 3 moles so far and that's helped in my back yard grass area. Up front where I have a huge barkdust area, the moles like to make those surface tunnels right under the bark, but it's not really a tunnel that you can set a trap on. I don't think they come back to those. They then tunnel down deep, so it's been tough to get those suckers.