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Review title: Initially good, then misbehaves.
Product review: I initially gave this a rave review but I've got to come and change it to reflect a new experience with it. At first, it printed just fine. Couldn't tell the difference between it and the OEM one. Now, a month or so later, it leaves vertical lines. After every 10 copies or so, I've got to remove the cartridge and shake it, and hope that fixes it. If it fixes it, it will re-appear after another dozen copies. Sometimes it will simply have a blank vertical space that runs the length of the page.I won't be buying another one.
