I've bought them several times, changing the chips is easy and I've had no trouble getting the printer to recognize them. However, I sometimes had problems with the print quality. Towards the end of the black cartridge I had some streaking issues but I replaced the toner and it was fixed. I had fixed some issues with the magenta and cyan cartridges causing the toner to fall out sideways, printing with color dots and replacing them again with new ones, both were already at the end of their life anyway. I will continue to buy these as you cannot find a better price and the quality of the prints is generally very good.
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