It would be helpful if reviews stated which shipper sent the product. Usually, Amazon links all reviews of the same product together, regardless of the shipper, so it is confusing when one person says the product is genuine, yet another states it is a generic rip-off.
I bought what was stated as a "genuine Brother product" for LC613PKS cartridge, shipped by Sophia Global. The cartridge was not recognized by the printer, and it was re-installed several different ways. I needed to print right away, so when I purchased and installed a genuine Brother cartridge from a local store, it worked just fine, so the problem was with the cartridge that I received from Sophia Global.
When I notified the shipper, Sophia Global, of the problem, they revealed that their cartridges are generic, NOT genuine Brother products.
The genuine Brother cartridges are very good products. The ones that Sophia Global sends are highly deceiving because the word "Brother" is printed on the cartridge. However, be forewarned that Sophia Global does not sell genuine Brother products, regardless of what the Amazon description claims.