I've had some problems with cartridges not working in my ...
586113
I've had some problems with cartridges not working in my Canon Pixma mx870. I called Sophia's customer service and they promptly sent me a replacement which did work. I see no need to purchase original Canon cartridges. I save a ton of money by purchasing these.
663476
I have used two cartridges.  Both have worked fine with no problems.  I don't think the color prints quite the same as the factory cartridges, but this is acceptable for my business use and the price is great.
1110999
We were contacted by Toner Tap about our issue with the cartridges not fitting.  They sent us a new set of cartridges that work fit fine in both (HP) printers but one is more particular than the other.  The one works just fine with the Toner Tap set and the other printer seems to be more sensitive and we are working to resolve that specific issue.  Lani was very easy to work with and willing to help us.  We certainly appreciated her assistance.
1131022
Cartridges didn't work in printer.  I tried two different ones that were immediately tagged as  faulty. They were loose and floppy in the cartridge holder inside the printer. I need a refund.
3608796
I've used 2 of the 4 cartridges so far and I am very happy. No problems at all and I saved a lot of money.
623038
THE FIRST CARTRIDGE I RECEIVED DID NOT WORK AND I WAS VERY DISAPPOINTED.  I TALKED WITH SEVERAL CUSTOMER SERVICE PEOPLE AT EPS AND FINALLY THEN SENT ANOTHER CARTRIDGE THRU AMAZON AND IT WORKED PERFECTLY.  I WILL BUY THIS PRODUCT AGAIN WHEN IT RUNS OUT.
963346
So far no problems encountered.  The cartridges that have been used are working correctly.  Unknown regarding how long they will last.
1747290
The cartridge was dry.  Don't want that to happen again, so I guess I'll just go to my local "office" store to be sure.  At least if it's dry there, I can just take it back for another one.
302881
unfortunately the cartridges did not work with my printer.  Had to send them back which I did not have a problem with.
2860516
Ink cartridges came up as invalid and/or empty by my Canon Pixma MX882 at first, so I tried removing and resetting them a number of times before it finally worked. Seems to be working for now.
27077
Black cartidge worked find out of box, but when I went to the first color, it would not work.  The second color cartridge seems to work, but I need better reliablility from my cartridges. Next thing is to contact the seller to get a replacement.
3510140
Having mixed success. Right now I have 3 or 4 cartridges that seemed to drain super fast.
564603
I inserted 5 new cartridges and one of the cartridges was not recognized by the printer.  Pulled it out, swapped it with another one, and it was fine. Not sure how many others in the box will give me an issue, but I'm docking stars because 1 out of 6 had an issue. Maybe I got the 1 out of 1000, who knows.
2039319
My printer works great with these cartridges.
3591050
As with any "Remanufactured Ink Cartridge" It will be hit or miss if they will work.... I had one cartridge crap out after a few pages of printing, while the other continues to work...for now.

On plus side, the price is right, especially if you get stable cartridges.
281996
So far one of the black cartridges would not communicate with the printer. The two I have in now work fine.
1721989
Two of the cartridges would not work - one black and one colored - tried overriding but get failure message all the time.