Bought a few of these to take to our Vermont ...
350362
Bought a few of these to take to our Vermont camp in May. They work as advertised, though they keep in a surprising amount of heat if you're working or hiking.
304036
Work awesome from Vermont to  Paris Island South Carolina and back to Vermont I did beak a clip but that was my fault I pulled why to hard
4711159
While we were shorted on one color, we got extras of others.  Enough to work for us -- and these are great manipulatives.  Wood would be nice, but these will hold up and be valued for quite some time, so plastic works. I like the container, though wish it were square for easier stacking/storage on book shelves.
105842
Purchased these from another vendor outside of Amazon. Had to order 12 pairs of them for a series of custom built drawers in a closet. As a previous reviewer noted, they come without any mounting hardware - you'll only receive the slides - so plan on having some #8x1/2" or #8x3/4" pan head screws handy.

Lucky for us, we ordered as many as we did. In the first few packs opened, we noticed that the self-closing speed was different between the two slides in a pair, once by as much as half a second. That may not seem like a big deal, but when one side of a drawer starts self-closing while the other side lags behind, the drawer will bind. So, first thing we did was open up all the packs and start pairing them up by speed of the self-closing mechanism (which appears to be spring and hydraulic). With 24 individual slides, we were able to pair them all with an appropriate match on speed. If you only order a few pairs of these, just be aware that it might be an issue. I did not see a way to adjust the self-closing mechanism.

All in all, a great value for the money on initial quality. Time will tell how these hold up to higher quality brands.
2594898
I bought these to bring into the Colorado back country and light up our snow camp, Fort KickAss.  They stood up to the elements and worked with all three different battery packs that we brought along.  I posted a picture so that you can see how bright these little buggers are.
3012477
They are lightweight and collapsible so I was able to take them in my suitcase on vacation.  I wish the prongs were a little closer together to fit standard marshmallows better.  They sometimes are a bit hard to slide open (extended) or closed.  They were the right length for our campfire.  The prongs are blunt, but it would be nice if they came with a cap, but then they would cost more.  These were fine for the price.
1047482
Just what we needed for a few projects around the house.
1954053
Bought the ECO 11 for a small house in Southern West Virginia that we only go to 4 or 5 times a year. The water tank never heat the water in time for us to use on our stay and then we have to drain it in the winter anyways. So I thought that this was worth a try. Haven't used it much, but so far it is great to take a shower in the mountains now.
2388118
Worked great for our small place where we were able to hang them on the fence and cover them with plastic to keep the snow from getting in them.
3018733
These push pins work great for for documenting your travels on a map because they're on the smaller side so you don't have to worry about them hitting the wall when you push them through a framed map. I do think they're a little too small for using on a cork board to hang pictures, invites, etc. Also, it states that they come in a pack of 100 but there were only 92 in my pack. They were all intact and none were broken. They were packaged well. I did receive these at a discounted rate in exchange for my honest and unbiased review. My opinions are my own.
1998603
I bought the 4pack. Was about to order another when I noticed one of them doesn't work anymore. Otherwise, they are very handy and easy to move around.
3653315
Have rentals and it seems almost everyone takes these when they leave. Saved a lot of money by buying in bulk.
4007096
We have bought a few of these and have been very pleased with the quality.
4122781
We had great luck on our one week camping trip with these.  The pumps worked great, and with a little practice the mattresses fold up beautifully and slip back in the bag.  One charge was enough to coax 6 days of inflation out of the pump, IF we didn't use them to deflate the mattresses.

I will report back as I use these more to comment on longevity.
852895
We used these as souvenirs for a volunteer project - the kids LOVED them. There were a few that came broken in each package, but I can overlook that for the price. I was also surprised that they're functional.
1226045
Update on how these worked out for us and are still great. We liked these a lot. Turns out we don't want to add a light to our new helmets and we can wear these with the helmets and niether interfere with each other. Basically these are just nice lights. We used two sets to go through long railroad tunnels turned mountain bike trail. And so like these better now that we've had them for more than a year. I still would like them to be a bit lighter weight. Overall I would recommend them and beats the higher priced ones or works as well as any meeting our needs.

Original review:
We have several brands of these things...and we have rechargable ones even that are more expensive. But looks like these well do the best job for our needs when riding our bikes on converted old railroad beds that have long tunnels. Last time our lights were definitly under powered. Never again..I wish they were a bit lighter but need that power. I didn't find a problem with the battery case at all. I hope it doesn't open up on us as it didn't seem to catch all that much but easy to use. Simple switching and not enough information about how long the batteries well last in the literature with them. Overall well fit our needs but not over the top great. If the batteries carry us through a whole days ride with about 9 tunnels including one a mile long then that's all we hope for.
3238410
Bought more than one for my family but a few of them were a bit shaky and not as sturdy.