I've had people say not to use compatible inks and now I know why. While my first cartridge seemed to work well I cannot get any of the four remaining cartridges to be regonized by my printer (Brother mfc-440cn). It keeps telling me there is "no cartridge". No matter how I jiggle or push it will not recognize it. I don't know if it's a product defect or the first cartridge I used damaged my machine. Good luck!