Positives:
+ Unbeatable price (price per cartridge 90% cheaper than the original!)
+ Cartridges are brimming, so no deceptive
+ Not have a bad experience from leaking or dripping ink, as sometimes happens when refilling
+ Super color reproduction on paper
+ Packaging division with more black cartridges ideal
Neutral
~ When processing an original "valve" at the back has been replaced by a pure plastic film, but this has no adverse effect
Negatives:
- According to Terms of Brother repair by use of the cartridge is given no guarantee in the case
Conclusion: Absolute buy recommendation, rarely was cheap as well!
I hope I could help you in your buying decision!