Almost as good, and much much cheaper,
Verified Purchase(What is this?)
This review is from: 4 Moreinks Compatible Black Printer Ink Cartridges to replace Canon PGI-520BK (Office Product)
I no longer have my Canon - it suddenly died completely - but while it lasted I was happy to use these inks and the printer seemed to accept them without problem. They don't last as long as Canon cartridges but they are still much better value.