Review on LxTek Compatible Canon 137 Toner Cartridge Replacement - 4-Pack for ImageClass Printers (Black) - Ideal for MF236n, MF247dw, D570, MF227DW, MF229DW, LBP151dw, MF217W, MF216N, MF249dw, MF232w by Miro Dadee

To be honest I didn't expect much from them because the reviews said they weren't very good as they weren't a brand. But I didn't want to keep paying over $80 for a Canon cartridge. So I decided to give them a try as it was 4 cartridges for only $37! For me, that's stealing. I print A LOT for homeschooling and still use the first cartridge. I had no problems and it didn't mess up my printer. I definitely recommend them for value for money!