My Epson Workforce 520 has repeatedly refused to install this ink because it is not from them. It took at least 5 tries and about half an hour of retries before he finally accepted. I was about to return the cartridges before he finally took them. It was only for one cartridge. I don't know what to expect if I have to install more than one. Very frustrating! I'm not sure if all the effort is worth it. Update: Uniwork sent me replacement cartridges on September 14th and I didn't even ask for them. They have shown that they stand by their products and on that basis I would recommend their product to others.
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