At first I was quite happy, everything worked. This has now changed. After four months of operation without major use of the ink cartridge, the cartridge has been shown with the red color as leaking, as evidenced by the fact that the printed images are smeared red on the mere black and white printing. When the printer opening has then shown that the entire cartridge including the roles and also the neighboring differently colored cartridges are completely covered with the red dye and smeared. A big mess and the GAU of each printer owner. This is never happened to me. I hope I succeed the cleaning and restoration of faultless print results. In the future, I'll probably stay away from these "compatible" let toners.