I do some work for HP and what we found in our "lab tests" is that 70% of the time using "remanufactured" inks or refill kits is that you will cause damage to the the cartridge (it may break, spill or leak), damage to the printer , or damage to your document or photo (color fastness, dryness, water resistance, long-lasting capabilities). Also, you have no clue as to how good or bad the ink is they are putting in there.
But some of you, I had an Epson a few years back and I bought remakes of the blk for US$2 and colors for US$3! Hard to beat until that one day a black cartridge broke while printing. Needless to say it was time to get a new printer.