Wow. I was so scared trying the wrong toner cartridge for my Brother 2 tray printer. I kept hearing horror stories about cheap toner cartridges DESTROYING people's printers. But I read the reviews on HaloFax and it seemed legit. The price was too good to be true. I was nervous. But as a mobile notary I spend over $1,000 a month on genuine Brother toner cartridges and was desperate for a cheaper way. I ordered a box of two HaloFax cartridges, crossed my fingers, and started typing. The BEST decision I've ever made. These toner cartridges print BETTER and STRONG than Original Brother cartridges! That's great! I've printed over 25,000 pages with these cartridges and have had NO problems at all. I'm SO glad I ordered them. customer for life.