Like most of the items Monoprice sells this is a value you can't pass up. The same quality as the OEM at 80% discount. The cartridges last longer than the originals, the ink is sharp and clear. WHY PAY MORE
I've been using this ink for over two years. I have not seen any appreciable difference between this ink and the Canon original ink, except of course the price. Do be careful when opening the cartridges for installing, as I've come away with some spots on my fingers and a drop or two on the desktop.