This month I've gone through 2 packs of these cartridges on my CX6000, and I had only printed a dozen pages before the ink ran out both times. 10 of those pages were just to print test pages to realign the printer. I'm through. I'm getting rid of this craptastic printer and it's dinky cartridges and buying something more substantial. For ~$35 a set, I want a lot more than 2 good prints kthx.