My printer is probably 20 years old but, still functions perfectly. I have tried off brand ink cartridges which are less expensive but, they don't work nearly as well as Brothers. I am pleased to continue using this product.

Easy install and great print quality with no blotting or smearing. Hard to find in local stores pleased to find online to ship in at low cost shipping.

The BrotherLC51BK Black Ink Cartridge performs well, but the 4 cartridge requirement of Brothers 51C means that two full cartridge replacements cost more than the printer/fax/scanner/copier.

Quite often when I go to the store, my particular printer ink isn't on the shelf. Ordering online means I don't have to make a wasted trip to the store. Online shopping is a convenient way to purchase my ink cartridges.

Because I have a Brother printer I can only use Brother ink. I would recommend this product for anyone that has a Brother printer

7/30/14 purchase one , 8/1/14 received very good use , inexpensive , rapid delivery , has ordered two again ! ,

A Little pricy, but what ink cartridges are not? However there is no problem with the quality of the product.

WalMart has the best prices on Brother ink cartridges. I know - I have shopped around and this is the best price for me!

I have a Brother printer and with a Brother cartridge, I have less worries about it leaking afterwards like with the substitute cartridge.

Work in a Brother MFC440CN printer, no problems.