Review on HIINK 1-Pack Drum Unit Replacement for Brother DR630 TN660 TN630: Compatible with DCP-L2520DW DCP-L2540DW HL-L2300D HL-L2360DW HL-L2320D HL-L2380DW HL-L2340DW MFC-L2700DW MFC-L2720DW MFC-L2740D by Brandy Young

Worked as described (almost a week in a busy print shop) the only problem was that after changing the drum (on HL-2300D) the drum lamp kept blinking and the printer refused to print. I had to reset the drum as shown below to get the printer working again. * Make sure the device is turned on. * Open the front cover. * Press and hold the Go button for about four seconds until all LEDs light up. .* Close the front cover. I would honestly give them 4.75 stars if I could (because of the reset issue) but definitely closer to 5 runs than 4!