Review on High-Yield Black Toner Replacement for Samsung MLT-D203L/XAA: Compatible with ProXpress Printer Models M3320ND, M3370FD, SL-M3820DW, M3870FW, M4020ND, M4070FR - HI-Vision MLTD203L Cartridge by Jacob Brooks

It's "compatible" in the sense that it loads into the machine, but each page comes out completely black, multiple paper jams, extra powder not fused through the drum, with a handful of pages that aren't jammed are . All about a printer that used to work great. The original Samsung cartridge has been replaced again and is working great again.