I use these cartridges in my HP Photosmart 5510th It is highly advisable to wear gloves when removing the Pastiksicherung and inferior in any case what. The chip has been adopted without any problems and the level indicator is working properly. From the print quality I can not see any difference from the original HP cartridges, not the normal color expression even when printed in photo quality. I can therefore recommend this product without concern. Finally, I would like to mention the rapid processing and delivery via Amazon also praised again.