The bigger problem I've seen w/ off-brand toner are refilled cartridges that are poorly plugged and end up leaking toner all over the inside of the printer. Ton

The bigger problem I've seen w/ off-brand toner are refilled cartridges that are poorly plugged and end up leaking toner all over the inside of the printer. Toner is a nightmare to clean up, and once you get toner deep into the nooks and crannies of a printer you'll never get clean paper output again.