Got these for my well used Brother MFC since the OEMs are way overpriced. These are much less than the originals and work just as well for regular color prints with 25-50% coverage. I have not tried any super dense prints. They were recognized by the printer as per instructions. The packaging was quite adequate with a foam separator on every drum which is very important in transportation. The roller spring tension proved to be adequate, I had no problems with sheet pull through even on the semi-glossy paper. On the coverage ratio I plan for I do not see any toner separation or fade lines after at least a couple of dozen prints, the blending seems to work as well as on the originals. Over all quite happy with the cost and the results I am getting. Some complained but I did not see them say their drum was good or not because that makes a huge difference - OEMs or not.