... Least 1/2 point for the still prohibitive prices of these cartridges,
... Least 1/2 point for the capacity that is shrinking every range renewal CANON (15cl> 13cl> 9cl ....).
... Least 1/2 point for the non-existence of over-capacity cartridges, a little bit cheaper as the competition is doing now.
... Least 1/2 point for starting / cleaning cycles that empty them regularly or not being printed cartridges and fulfill the foam pads (under the print head when at rest) and end by blocking the printer (in a mandatory cleaning approved center to unlock the printer> 69 euros).