I ordered ink cartridges for my Canon MG 7720 printer. They arrived in decent time. I installed the cartridges and printed a test page, had white lines horizontally through the printed page, 5 of the lines appeared on the page. I ran the printer through a light cleaning process and tried again, same lines appeared. Did some more cleaning as recommended by Canon, still could not get rid of the lines. I removed them all out of the printer and installed Canon cartridges, did a test page and had excellent results. I was quite disappointed with the cartridges, tried saving some money and now I have 5 nearly full cartridges from 123Ink.ca and had to spend more to replace the inferior ones with Canon cartridges