Only because of the partial -unverständlich- bad reviews: Use the Kyocera 1370 DN. Purchased 2013. Since then -after the consumption of the first supplied Originalpatrone- only those compatible cartridge / cartridge used. Never, never, never any problem with it. Meanwhile, at least 5 of these compatible cartridges consumed. At a price of original cartridges from about 90 E and a-unfortunately now some erhöhten- price of now about 22 E for the compatible cartridge results in a saving of about 5 cartridges 350 E, equivalent to almost (!) The purchase price 2 new printer. The printer runs every day (except weekends and holidays). Since you can not go wrong either with regard to the printer (for about 190 E) or with regard to the filling. Expensive always goes, but need not always be better (for example even a color laser multifunction device from Samsung for probably about 600 E, expensive cartridges and compatible cartridges that was a letdown, which used only a few color prints u. Faxes was, in the meantime waste). One must indeed be stupid if one per cartridge almost 4 times more than pays for the compatible cartridge. Especially since this (I have not tried other) cartridges work well. What causes the bad reviews if they do not come from a competitor, I can not understand. And now I order 2 cartridges, because the last one was just used.