had ordered the aforementioned toner, it should be enough for approximately 5,200 printed pages. Now my device Brother DCP-7055 announces the toner is nearly empty. I've run the unit in saving modes, prints only plain text pages, and see from the menu that total, ie printed with the initial supply until today 1,836 pages. Something can with your details to the "reach" of the toner not agree, or expect you so that your customers do not take the trouble to compare the data? I will adjust this review about your product on Amazon, so no other customers to make similar negative experiences. 06/17/13 after this review has me contacted the seller and further information on the printing of the toner cartridge given (rest, etc.). This information was helpful, the printer is running again with the previous cartridge. We are sorry for the first review!