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 Hugo Caywood

Worked as described (for almost a week in a busy print shop), the only problem was that after replacing the drum the drum lamp kept blinking (on HL-2300D) and the printer refused I had to reset the drum as shown below to get the printer working again.* Make sure the power is on.* Open the front cover.* Hold the Go button for about four seconds until all the LEDs light up . high. .* 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!