These cartridges work great. Unlike many of the off-brand refills these cartridges pull out the last drop. Also they do not kick out errors saying a cartridge is low when you recently replaced it. Granted you are paying premium price for them that premium price = quality. In my business I do not have time to mess with ink cartridges that smear/clog the printer head.
hp printer likes these and so do I. Since I have a daughter in college and I teach; the printer gets a work out. Buying the large size of ink saves me money in the long run.