I've purchased about 10 cartridges. Cartridge quality is not consistant, but acceptable for DRAFT and in-office docs. 1) Out of the box, faint, veritical lines appeared when printing envelopes. For my current cartridge, the lines disappeared after a about 50 pages of printing. For a previous cartridge, the lines never faded and I could no longer use the cartridge. 2) When using a newly-purchased black cartridge, splatters of other colors appear at the top or sides of the page when printing black/white and greyscale. In summary, I'll purchase InkTonerStore cartridges again, as the price outweights the issues. But I use another printer with genuine cartridges for best-qualitying printing.