Great buy - just over $15 each and free 2 day shipping. I pulled the tab, removed the 2 orange locking rings and put it in the printer. There was a large black streak on the test sheet which appeared to be the result of pulling the tab - since then over 100 sheets have been printed and they are all excellent quality. I'll let you know if I run into any durability issues, but so far I'm thrilled. UPDATE: Now that I've used it successfully, I went to the cardboard recycling and saw the instructions that came with the toner. It means placing the new cartridge on a flat surface and slowly tugging on the tab, being careful to pull it straight out. The black bar I got on the first test page was undoubtedly caused by pulling the tab quickly rather than directly. I think it's still important to read the directions, dumbass. So the black line was me, not the manufacturer. So far it works just as well as the famous brand.
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