I killed two of these
594909
Over a period of a few years two of these died in my laptop under fairly strenuous circumstances. Hard drives don't like to be bumped when they are spinning and my laptop rested on something that would get bumped a bit every time I sat down next to it. Maybe I was killing perfectly good hard drives.
1217566
My poor little lady bugs died shortly after I released them. I don't know why... I sprayed the plants with water and left out sugar water for them and put them in my closed room. They went crazy it was awesom. Until, I checked in the next day and that were dead :(
2329343
I think this trap is too small to cleanly kill any but the smallest of mice; for anything bigger, it's an extraordinarily cruel death.  I give it two stars rather than 1 because it did eventually work for us, but our mouse died of a crushed mouth/nose tip in a glue trap.  Probably took several hours.

Our experience was this: We bought 4 of these to get our unwelcome guest.  We placed them in spots we've seen him active, along with glue traps in front of the holes he ran into to escape us when we saw him.  (He was a pretty bold mouse -- big too, like 4 inches without tail.)

We first tried peanut butter, but, except for a couple of times when the mouse triggered it without getting hurt, the trap was just getting licked clean without triggering the trap.  We were baiting sloppily, putting on too much peanut butter.  So we reduced the amount of peanut butter and put little gummy fruits (about half the size of a gummy bear) in the trap.  The peanut butter got licked clean that night, and we just left it -- maybe now he would go after the gummies.

The glue traps he just avoided, even the ones right underneath his hole.

Sure enough, last night, I heard one trap snap and went down to investigate.  Nothing.  But when I woke up, I found the trap on the kitchen floor snapped, and it had gotten him.  He wasn't actually in the trap, though -- we would never have known it got him but for the fact that he was lying dead, on his side, in the glue trap we put in front of his hole.  There was a puddle of blood pooled up underneath his mouth.

So, he likely got a little too bold (he had triggered the traps about 4 times, and instead of getting trap-shy, he pushed his luck), and tried to grab the gummy.  It snapped down on the bridge of his nose, mortally wounding him in the mouth, nose and teeth.  He must have then attempted to get back to safety, but could not manage to be spry or careful, so he stepped into the glue trap and died there slowly, eventually laying on his side in it.

I imagine this trap *could* be good for very small or baby mice, but otherwise it just isn't big enough to snap down on their neck.  I feel pretty bad that the thing had to die like he did.

So, I guess it worked in the end, sort of -- if we hadn't had the luck with the glue trap, we wouldn't have known it worked until we smelled the rotting smell from underneath our dishwasher.  But I'd rather have a real trap that kills him on the spot and doesn't let him wander away in pretty awful pain.

I do not recommend, at all.  It's just too small.
86047
I purchased these at the local store, the selling point for me was the fact it killed the mouse instantly and I wouldn't see it. What a crock. The traps do work and they are effective but they do not kill the mouse instantly. When the trap tripped and swiveled around I went into the kitchen to see if it was a false alarm. I picked the trap up and noticed it was warm and I could feel the mouse 'twitching' inside. I thought it was just the dead mouse having 'reflexes' so I left it on my desk while playing Skyrim and the thing was still making scratching and struggling noises inside the container for 3 hours. I felt so bad that it had to die in such a painful way. I wanted to try and save it but once that thing spins around, there is no going back. I am never using a kill trap again despite how instantly it claims to kill the mouse. I purchased two no kill, humane traps and I have used them ever since.

The D-Con device itself has no killing mechanism inside of it, all it does is 'crush' the mouse between two circular pieces of plastic separated by an 'S' shaped wall inside. The mouse actually dies from either starvation or lack of air because it's trapped inside, or from trauma to its body from being crushed but NOT INSTANTLY. I broke one open, and then started to feel remorse for what I had done to the poor mouse.
2784642
Maybe they catch insects but they are not safe for other small animals. I won't use them anymore. They made to kill a bird that got glued into it.
179392
I worked fine. But, now I have two pieces. When I went to remove it from my iPod it came apart in two pieces. Now it is junk.
3122118
I got a new tank at the time I got these rocks and my old betta fish I had for three years needed a new friend in the new bigger tank, so I added a tiny frog. The frog died in probably a week or so (I didn't realize because he didn't move much to begin with) and the old betta was dead this morning. I wish I'd caught I sooner. I've thoroughly rinsed these rocks about 20 times and the water still comes out blue. I'm getting new rocks tomorrow, but I'm still thoroughly upset that they killed the fish that went everywhere with me for the last three years.
632439
The first one was a little difficult to use.
The second one was easier.
Apparently they are not to be used while the turkey is still alive.
102989
I put three of these stakes in my back yard, and ten minutes later two of them were up in my trees with my squirrels eating them.  I really hope they don't die.  Don't buy this if you value your backyard wildlife.
4183815
2 died after about a month. I do water them regularly as recommended.
4920268
I bought two packs of these, put some creamy Skippy peanut butter in the little cup and set them out around the house. Within two or three hours I killed five little mousies. The force on these is so strong they don't even move after it snaps. Instant death each time. I cleared the traps immediately every time I heard one snap and the mouse family never who what was hitting them. They kept going for the peanut butter. No more mouses.
1287226
I purchased two of these lightbulbs, and wish I hadn't, as the first one exploded (for no apparent reason) about 3 days after putting it to use as a chick brooder warmer.  Thankfully I was close by and heard the sound, as glass shards were all over the brooder.  I found a bit of blood, but haven't found an injury among the chicks.  I had it screwed into an appropriate holder, it wasn't being touched by anything, and had plenty of circulating air around it - I have no idea why it broke so explosively.  DO NOT BUY IF YOU VALUE YOUR ANIMALS.  I have the second bulb in use currently, with strong, fine wire mesh completely enclosing it just in case, and a second heat lamp - different brand bulb - just in case this one breaks also.  As soon as I can buy a different bulb this one is going into the garbage.
2015730
I shot a full grown possum through the lungs with these puppies and it dropped out of the tree and died instantly.  I hate having to kill rodents causing problems in my yard, and I try to live trap them as often as possible, but when I have to kill rodents, doing so in a humane way is important to me, and these pellets do a great job.
4183412
Killed ONE, 1 fruit fly. I have 4 traps out and the other flies are essentially laughing at them and just flying around
1663820
I blamed the first incident on myself, but two can't be a coincidence. Avoid.
2575033
I was on a roll catching mice with these 2 traps, until one of them broke. Seems the little plastic pin that the trigger is connected to broke, no idea why. Going to order a couple more because they do work, I just hope the broken one was a fluke. Use pieces of snickers bars for bait you won't be sorry. I'm up to about 20 mice caught in the last 2 months, all under the house. I've been using crunchy peanut butter, reeses, and snickers, and they go for the snickers every time and ignore the other peanut butter and reeses.

update: I've had 3 now that are broken. They break in the same exact spot, a little plastic pin that breaks off on one side.
1945552
Didn't last 2 months before they started dying