These simply don't work!
582976
Definitely do not buy these! Bought one for my son, followed the instructions exactly to get it going. Held the button down for 30 seconds as it said to, and the motor was going but no bubbles came out, the mixture just dripped down into its mouth. The best we got was one bubble coming to the top and then popping before it even came out. Then after a few minutes of trying to get it to work, it just stopped working, even though there's no bubble mixture in the battery compartment.
3887087
Bought this 2 pack -NEITHER of them work at all, right out of the box.
3599925
Installed (7) of these in a customer's home yesterday.  Mind you, this was some 65 miles one way.  This morning, I received a call from the client that all of them went off, falsely.  If there is one thing I despise, it is a call back for faulty equipment.  Today, these will all be changed and returned for a different brand.

Don't waste your time with these.  I certainly wish I hadn't.
3599176
I have tried everything to get these to work - followed the instructions that were provided about cleaning the cartridges and aligning the printer...tried this numerous times, but  I have never been able to get anything to print correctly ...the colors are off and smeared, and the printer constantly is saying that the cartridges are damaged, which prohibits the printer from even working.  I've tried all of the cartridges, thinking that maybe there was a problem with one or two of them, but nothing seems to work. From now on, I will only buy HP cartridges...its not worth the hassle or frustration!
2356839
Purchased these mid March 2018. The price got my attention. I thought to myself that if they worked then it would've been money well spent. Unfortunately they did not. I ordered these as soon as the low ink indicator alerted me. Well about 3 weeks after I received them, I try and replace the dry cartridge with one of the new ones and the printer wouldn't even recognize it. It kept saying to use genuine HP ink or that I had not replaced it properly. Well as soon as I got an HP replacement for nearly $45 at a local office supply store, it works just fine.

Long story short, do yourself a favor and use your hard earned money on the name brand cartridge. These are just a waste of your time and money. In addition, I question the authenticity of the initial 2 reviews. Probably some ineb
3485846
Bought em for my A867 and they didn't work at all. Not even as headphones... Garbage.
3721569
Received and did not work at all! Shop elsewhere, stay away!
2320952
None are working .. I sent them
all back ... :((((
update: i got new ones and some work and some are challenging .. thanks for following up! i ordered more again.
753295
These do not work at all! I bought two to use and they brought no signal to my iMac. Not good!
4837506
These don't work whatsoever. Ive tried multiple outlets and usb connectors, multiple controllers. These give absolutely no charge. Theyre garbage.
4877071
This is a waste of money, don't work as advertised
1803746
If I could give zero I would!  Nothing work as advertised.
4779843
These don't even work!! What a waste of money!!!
1935100
Don't work at all, don't waste your money.
1004504
I bought these REALLY hoping they would be okay. But alas, no such luck. After placing one of these in my hot shot on top of either my MKII or MKIII, and then placing my speedlight on top, it will not fire my speedlight. I've tried every setting imaginable, and it won't fire my speedlite. I did notice that I was sent the C2, while this advertisement is for the C3, but I'm not sure if that's what the issue is. Either way, I'm out of luck for this weekend. I am returning these immediately.
902153
totally worthless.  These are not flexible and they don't work.
3345112
I received these and tried and tried and could not get them to work!  I am returning them!!