It seems at the moment like a great savings, far less expensive choice than the actual Canon toner cartridge which is insane in price. However, I do not know the actual yield of this cartridge but seems to in line with the original. It is a pain in the butt however to get the printer to print anything from a computer (Complaining it is a BM cartridge) but will print unrestricted from the printer itself.

This cartridge requires installing the chip from the original cartridge. It's not difficult and a tool is provided with each purchase. An error message keeps popping up requiring pressing a little button (for volume) on the side of the printer screen that I did not even know existed until I tried these.

You need to remove (cut with knife) excess plastic, otherwise chip will not go in. Other than that it works well.