After I had already exchanged with my PIXMA iP4950, the yellow and the red cartridge without complaint against the compatible cartridges of START, the printer stubbornly refused to recognize the blue cartridge. After contacting the seller immediately sent me to spare. In conjunction with the positive experience that I have done with the other cartridges from the set (detected without restrictions immediately and deliver high absolute quality results even at the photo to eg DIN A4 Premium Photo Paper), I revise my first, critical evaluation and give the Podukt and the supplier 5 stars because anywhere once can drinstecken a "Monday Product" and if this occurs, quickly, very accommodating and unbureaucratic action is taken!