Granted, it's always a bit tricky if you do not buy the original product and lying less money. Often you will be disappointed, this is exactly the opposite is true. I have the DCP-7055 and print at home occasionally. Whether my original toner has 1,000 pages or 721 pages printed I do not know. But he was now empty and I needed replacement. Encouraged by the positive reviews I ordered the 2 toner. The delivery was super fast. Now I was curious if all goes well. Open packaging, replaced Toner Cartridge and turned on the printer. He immediately recognized the cassette - no problem. So a copy - no problem! The copies are not different from the original and the pressure also not blurred. How many copies of a cassette are now possible I do not know, but for the price per unit, the cassettes are unbeatable. I'm sure it will not be less than the copies will give genuine Brother cartridges. For this product, I give a very strong buy recommendation.