Customer Rating: 
Summary: Canon Ink
Comment: I agree with the other reviews...you MUST use Canon ink with the i9900 printer. Twice I tried to use other ink and had to replace my print head both times...not worth it!
Customer Rating:
Summary: Use OEM ink if you are going to pring photos
Comment: Canon original Magenta ink is a must if you plan on printing your own photos from a Canon photo printer. I've tried generics and they red hue is too strong. However I would not recommend Canon ink if you are using for printing graphics because of the cost. Greatproduct, price is more, but quality is the best.
Customer Rating:
Summary: Be careful
Comment: I ordered BCI-6M magenta for my Canon Pixma iP 4000. Amazon sent BCI-6PM Photo Magenta instead. It looks identical and fits in the printer but it will not work in this model. After contacting Canon they had me remove the wrong ink tank and install the correct one that works fine. My rating does not mean anything but I think Amazon should refund or send me the correct replacement.
Customer Rating:
Summary: Always use OEM ink
Comment: I have a Canon i9900 and I have always used Canon ink without any problems.Some of my friends have told me their horror story about using less expensive generic ink. It's not worth it folks, if you have a Canon printer use Canon ink, if you have an HP printer use HP ink. Same goes for Epson.
Customer Rating:
Summary: Great price for orignal ink
Comment: This was the lowest price I could find for original ink.
Summary: Canon Ink
Comment: I agree with the other reviews...you MUST use Canon ink with the i9900 printer. Twice I tried to use other ink and had to replace my print head both times...not worth it!
Customer Rating:
Summary: Use OEM ink if you are going to pring photos
Comment: Canon original Magenta ink is a must if you plan on printing your own photos from a Canon photo printer. I've tried generics and they red hue is too strong. However I would not recommend Canon ink if you are using for printing graphics because of the cost. Greatproduct, price is more, but quality is the best.
Customer Rating:
Summary: Be careful
Comment: I ordered BCI-6M magenta for my Canon Pixma iP 4000. Amazon sent BCI-6PM Photo Magenta instead. It looks identical and fits in the printer but it will not work in this model. After contacting Canon they had me remove the wrong ink tank and install the correct one that works fine. My rating does not mean anything but I think Amazon should refund or send me the correct replacement.
Customer Rating:
Summary: Always use OEM ink
Comment: I have a Canon i9900 and I have always used Canon ink without any problems.Some of my friends have told me their horror story about using less expensive generic ink. It's not worth it folks, if you have a Canon printer use Canon ink, if you have an HP printer use HP ink. Same goes for Epson.
Customer Rating:
Summary: Great price for orignal ink
Comment: This was the lowest price I could find for original ink.