Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does not work with MFC-420CN . . .

although I did as one reviewer suggested and clipped the tab and it works now. The color is brilliant. No problems at all.The reason I bought this is because I did once buy high yield black ink for my MFC-420CN, so I think the manufacturer did at one time allow this cartridge to work with the MFC-420CN. Maybe that's the reason some reviewers say it works and some don't.If you bought this by mistake, do as the previous reviewer recommended and clip the tab. I may buy another one of these just to save some money.