I use the product in my office. I have printed total of 8000 pages in the entire life of my Cannon printer/copier/scanner, but I have used 6 black ink toners so far and a few colored ones too. Doing the math, the toner does not cover nearly as many pages as they claim. It is just a scam to sell ink toner for [$] plus tax is almost $140 for just black toner.
Bought the Canon printer for the "color" fax that goes with this ink. The printer prints in color but does not fax in color. The ink is short-lived for its capacity and is way too expensive for its capacity also.