I can't believe it myself but my new printer came with a damaged toner cartridge which was leaking and smeared prints. My brother sent me another cartridge under warranty who also noticed and then claimed my drum was defective and demanded that I pay $125 for a new drum (for a $179 printer!). Problem, then these cartridges are with HaloFox toner, because a close examination of the new replacement cartridge supplied by Brother has shown that it lets toner through well. I was very pleased when HaloFox toner solved all my problems! I'm seriously disappointed in Brother, especially their extortionate prices. This toner is much cheaper and more powerful than two original cartridges. It's really amazing, but at least my printer works. I know where to buy toner next time. I still use the HaloFox drum and it works great. I think I'll keep my brother's drum in reserve, but I'll probably die of old age before I wear out the drum.