Comments about Canon Canon CLI-8M Magenta Ink Cartridge for Many Pixma Series Inkjet Printers.:
Don't change cartridge when the light starts blinking as it will print quite a few times after that and you waste ink if you change it immediately.
Comments about Canon Canon CLI-8M Magenta Ink Cartridge for Many Pixma Series Inkjet Printers.:
I would only use Canon ink in my Pro9000, so it's really a moot point (the Pro9000 is awesome, btw).