Good quality / price for average use over the year compared to other sites and big-brand shops. Insist the original cartridges with good color rendering Canon ChromaLife 100+. I use them on a Pixma iP3600 recent years and they do not waste too much use once calibrated. One may regret the highest use of Cli-521-C (cyan) and Cli-521-M (magenta) compared to other cartridges in the printer.