This is so much less expensive than the named brand it is worth a try. I used these cartridges with some success for a couple of years. But then I started getting terrible problems with no ink being delivered to the printheads. I tried all the automatic cleaning, putting brand new cartridges in, and then fully overhauled the printhead and was still frustrated. I was about to buy a new printhead but tried the Canon named brand ink one more time and that cured all my problems. So these cheaper version are a cost saving, do work - but not are as good as Canon and may give you problems in the long run or if you get a bad batch?
It's ink, it works for my Canon PIXMA iP3000 for general use (websites, documents, etc), but printed photos don't seem to have the same "pop", or match as well to the digital image as they did before on the same Canon photo paper. Still not horrible, and MUCH cheaper than Canon ink... but regardless, I will probably spring for Canon ink next time as I print many photos.