4 out of 20 or 20% arrived useless....
581314
Two did not have lobster claw closure on them at all, while two others had damaged closures on them, that when touched, immediately fell apart.  Had to decide if it was worth the hassle to return them all or worth the hassle to replace the closures...I went for the latter, but I SHOULD NOT HAVE TO HAD FIXED THEM AT ALL.  Be warned.
3282065
over 50% of the units arrived with either dead batteies, or the activation switch is defective. I know its supposed to be a toy and cheep, at that, but it should at least work the first time!!!!!
3561385
Many that arrived were blown already (or broken). Had to return a lot of them.
4971353
I ordered 10 standard empty clear replacement cartons for cds. I did get them on time, BUT out of the 10, only 6 were ok. the other 4 were broken. bummer cuz I really needed 10, so now......I have to order a few more, and pay shipping to someone else for such a little inexpensive product. bummer!  :(
2062588
The ones that work are great! But I think about 30-40%% of the lights did not work. Make sure you order a few more than you need to compensate for the non-working bulbs.
730083
Some weren't working, probably due to damage from shipping in a bag. Would like to see better shipping & "HANDLING" to prevent damage. The ones that worked were a GREAT HIT!!
2251945
Many of these just didn't work upon receipt.
2593090
I thought it was a good value but half of them don't work. Too much of a hassle to return.
2849262
I love these, but about 20% of them didn't work or shone very dimly.  Of the ones that worked, they are awesome!
2128097
Three out of twenty units did not work.  There appears to be no way to return defective units.  Do not buy from this vendor.
508176
We received our order, I was 10 pieces short. I notified shipper and they sent the missing items immediatly. Of the first 8 lanterns I have launched 2 had seams that were not joined. 1 was unusable. I have so far only opened the first 8 packages, so I anticipate even more unuseable lanterns.
1565323
Two out of three in the package I received don't work at all.  I was expecting at least minimal functionality.
3949394
They came on time, but that was the only positive...  we purchased to be gifts for party favors, but 50% were broken on arrival...  Don't buy unless they guarantee product will be shipped in tact.
2606495
Ordered three sets of batons (54 total). 4 came defective, which I knew I would receive some defective ones from what other reviewers say.

Because I ordered extra because I anticipated some defectives, I contact seller to receive a refund of the defective ones.  They responded quickly with "Unfortunately, purchases of extremely low cost, imported wholesale lots like this are not sold with a guarantee that 100% of the lot will arrive in working order. Such a guarantee would preclude us from offering the product at the low price you paid. Even though the yield is usually better, we consider an average 1 or 2 "dead units" per lot to be acceptable.  In your case, the number of "faulty units" are less than what we consider acceptable. We do not feel a refund is warranted."  I'm not happy about that, but the product is fun when it does work.
3574875
Says "20Pcs" right on the bag of 4. That's all I got. 4.
4471759
Four of the five work fine. One didn't work at all.
647038
Arrived broken - probably can't risk ordering again since they have arrived broken a few times