Review on Z Ink Replacement Brother TN450 by Patrick Diaz

I ordered two of these cartridges three months ago. When it came time to install them, the first cartridge failed, printing a smudged swath of ink on each page. I contacted the seller and he recommended installing a second cartridge that gives the same swab on each side. I concluded it was probably a bad batch. The manufacturer immediately sent me two new devices. I installed the first cartridge and it was perfect. Under normal circumstances I wouldn't give them 5 stars. But the speed and effectiveness of their response to the problem was exemplary. And for that I command them up. Should a cartridge fail or perform unsatisfactorily in the future, I reserve the right to downgrade my rating accordingly.