Positive full compatibility including the amount of ink remaining and for access to the website CANON restricted to users (wealthy) of ORIGINAL cartridges.
No difference with the original colors but I did not shoot a lot of photos.
Negative: careful when opening the read head side cover: a drop of ink it is sometimes ...
Do not pinch the cartridge by the sides but from above and below.
I recommended these cartridges in my two son (MG5550 and MG5450) and no problems were reported to me only.
I'll add the 5th star when there is no risk when opening cache ...