I have always thought that the big names in inkjet printers have overcharged for replacement ink cartridges. Sometimes, replacement ink can cost as much as a new printer. Rediculous, in my opinion. These ink cartridges from "First Call Inks" have proved me right. They perform as good as original Canon cartridges at a fraction of the price. The chip works perfectly. Just install and away you go. A terrific bargain.