I have these cartridges worried for my job, because we have a comparative MFC-5985CW printer from Brother. At first I was skeptical because we have done on many occasions bad experiences with non-origignalen cartridges. But: Delivery arrived promptly the next day. The cartridges were packed well sorted. They have held up now! Normally, the non-original cartridges hold so only half as long. But they can definitely compete with the originals. Also, the printing results could not be better! I would buy these cartridges repeatedly and can therefore wholeheartedly recommend it!