Wow, I've always been skeptical about other brands of cartridges, but I have to say I'm impressed! It's great for the price! For the price of an original Brother cartridge you get the whole set AND a bonus black cartridge. Right now I have 1 of each color set and they work great. If you change them first, the printer will make a fuss that the cartridge isn't recognized, but if you just pull it out and reinsert it another time, it will be recognized and you're done! Once installed, stock levels are updated and displayed on your computer so you can track your ink usage. Will definitely buy again.