I've only had these cartridges for a few days so I can't comment on their longevity, but after installing the new magenta, cyan and yellow cartridges in my Brother MFC-L3770CDW everything seems fine to work After printing some color pages it works great. I was a bit skeptical about buying cartridges from other manufacturers, but in fact Brother's prices are outrageous. I bought this EZ Link OEM TN227 package for $65. The Brother brand on Revain is $329 and if you buy direct from Brother the cost is $275. Also, these prices are just ridiculous. These EZ Link OEM's seem to work perfectly. Why on earth are you spending 4-5 times more? I would consider the Brother brand if it was maybe 2x bigger. But 4 times more? No way. The only "complaint" I have is that my software shows question marks "?" (see image) about the toner status via the Brother app, but this doesn't cause any printing problems.
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