UPDATE: The description below still applies but Toner Kingdom was quick to offer to replace the cartridges or, as they did, give a full refund for all four cartridges. I can only rate one cartridge that I have used and leave it up to the readers to determine if I received a "lemon yellow" cartridge. Four stars for customer service. Complete failure of my HP Laser Jet Pro CM1415fnw. I bought the pack in December when my printer was low on ink but didn't open the box until March when my yellow cartridge ran out. It worked fine on my little-used color printer for a couple of weeks, then colored horizontal lines appeared on the pages (see photo). When I printed a black document, the black lines would ruin the document. No cleaning, no adjustment helps. I put in my old yellow HP cartridge and although the printer only printed black, it no longer produced black bars. Hoping this would work I bought a yellow HP ink cartridge and now the printer works fine. I have not tried the other three Toner Kingdom cartridges.