Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Vibrant Color for Your Brother MFC Unit

The "Brother LC02BK Ink Jet Cartridge (Black)" is one of the necessary accessories you'll need if you purchased one of Brother's 7100 series MFC's. Rich in color, the ink cartridge gives you a good buy for your money. If you a person who doesn't use your MFC on a daily basis, then the cartridge will last you for a long time. However, if you're a person who constantly uses, then the cartridge;s supply won't last too long. That is the only negative thing about this product.Besides one minor fault, Brother's MFC/Fax accessories are one of the market's best buys in quality and performance. I recommend purchasing a few of these cartridges whenever your purchase them online so that you can have some on reserve just in case your cartridge runs out of ink.