I ordered these two cartridges for laser printer for my daughter who is in law school. In Brussels, a Brother cartridge sells for 60 plus 50 on Amazon (the printer itself is excellent 85), while the compatible cartridges are less than 15. They were delivered within 4 days (taking into account of the order made on a Sunday) and compatibility is total, no worries, no reset required. Total happiness for her before his exams in January !!!