I have always stuck with OEM ink, because the results and reliability are worth the extra cost to me (plus printer manufacturers are making it increasingly difficult to use non-OEM solutions).
However, it is beyond dumb to see the combos that Canon is offering for the new line of ink jet cartridges. If you want to save a few dollars by buying a combo pack, you either get this one which does not include the Black or Gray cartridges, or you get Canon CLI-226 BK,C,M,Y with PP-201 50 Sheets Combo Pack (4546B007) that doesn't include the Pigment Black or Gray cartridges, but includes 50 sheets of Canon paper that I do not need (I already have plenty on hand). It make no sense to not offer at least a 5-cartridge refill kit, since all of these Canon inkjet printers require 4 colors plus Pigment Black (not all utilize Gray). The only rationale would seem to be that Canon gets to line its pockets a bit more than it should.
I also have to knock off a star because the new cartridges are opaque, which may have been done to thwart refillers but also prevents users from checking the ink level themselves.
No wonder so many users go to such lengths to use non-OEM or refill solutions.