PROS: Works as advertised. Can't see any difference between these and 'genuine' Brother inks. Bought a full set of 4 cartridges from monoprice for less than the cost of 1 Brother replacement cartridge (and that's including the cost of shipping).
1 out of 5 cartridges ( 2 black & 1 of each color was ordered ) leaked and damaged printer, desk & carpet. All they replaced is one ink cartridge. All the cartridges ran out of ink after printing about 30 pages of normal documents. I guess it was a learning experience.
if possible, I would give it a zero. Tried multiple solutions to prime, clean, fix, print. The ink is there but upon inspection of an OEM cartridge, this after market cartridge is missing a white gear like circle that completes the seal for the ink to be delivered to the page. Ink doesn't make it into the machine. I can supply pictures of OEM and after market as well.