I am extremely disappointed by this printer cartridges. At first everything went well. After replacing both the cyan and the black cartridge, the printer worked flawlessly and the printing quality showed no difference. However, after the magenta cartridge is replaced, the printer is no longer the black cartridge suddenly realized. Even repeated removal and insertion brought nothing. Although the black cartridge was barely used, I finally decided to replace it with another from the package. The result: Again, not recognized. Only at the third cartridge, the printer accepted it. In the end therefore landed 2 unused cartridges in the trash! A friend recommended me another home for the cartridge purchase. I think I'll buy from now there. This page has many awards from various PC magazines. Advertise I want here but do not make, since I myself have not yet been ordered there. But on request I am happy to pass the homepage address.